I'm not giving up on a 4k 17" rMBP. The new move to PCIe SSD systems, 100% efficiency with their RAM, thunderbolt 2---this could be a match for the new MacPro including workstation graphic solutions.
I don't think a 15 watt ULV CPU will ever come close to touching a 12 core xenon. Graphically you have MUCH less CPU power to push that GPU and over a narrower interface (PCI x4) with more latency (cables). The air's PCIe drives are not better than any sata drive for random I/O
Peak random read performance is roughly comparable to the previous-generation Samsung controller. Random write performance took a bit of a hit but it's still more than fast enough for client workloads. Sequential speeds are much improved but the gains are really only visible at high queue depths. Low queue depth sequential transfers cant be split up enough in order to really require PCIe.
The new air boots a little faster and the 'snappiness' increase is likely due to lower latency bypassing the sata controller.
I guess I'd argue by 'pro' you mean making money with said machine, right? Isn't THAT the definition and difference between professional and amateur? These days I run my business and pay all of our bills as well as mortgages with Macs alone. And other than our 2010 MacPro, I've not found myself in a situation that I could make more money with 32GB of RAM in my MBP. I see professionals EVERYwhere with Macs, including an extremely successful pair of friends of mine using the new 13" MBA. They own one of if not THE most successful advertising agencies in our market. They were at our fantasy football draft last night going on and about what an 'improvement' for them their new (13") Airs were in comparison to their 17" MBPs. They run an ad agency...print, video/TV, radio/audio production. A lot of graphic, still and motion design and creative work...as well as the website design and digital 'apps' and social networking for local businesses. Point being...
TL/DR---as successful as possible which in my book equals 'pro' or Professional.
My doctor uses an 11" Air. I consider him a pro
We're doing the front of house and back line for about a dozen bands at the state fair this week and last. Foreigner, Bill Cosby, Philip Phillips, Bret Michaels, Hailstrom, Three doors down...several others. All DMX and recording is via Mac. A couple bands are using Macs and iPads on stage.
They're pros. I promise
Its kinda obvious that the 'pro' moniker is referring to the work done with the machine. Its also kinda obvious that most of that stuff could be done on a windows craptop albeit slower perhaps due to the deficiency of a SSD. The very fact that the new airs were an improvement to the 17" MBP's would suggest that they are not using the machines for intensive work (assuming that the 17" has an SSD which can easily be added). Like the mac pro, 'pro' represents and stands for intensive use requiring a lot of power (or perhaps use under intensive conditions such as toughbooks) not stuff that could be perfectly well accomplished with an air (vs the rmbp 15").
My doctor uses ancient core 2 duo machines running XP. I consider him a professional. However, I understand
that he has no need for a powerful computer system; he does not use computers professionally. There is a difference between a professional in a field and someone who uses a computer intensively.
Are you running your computer near its limits? Would a faster computer make much of a difference? If your not then you are not using, and have no need, for a professional level computer.
Macbook Pro does not cater to a lot of the professional market. While they may be useful in certain areas such as film, design, music, etc they are not nearly as useful in others such as engineering, physics, mathematics, industry, computation, etc. If apple truly wants to enter this area then they need to add,
or at least have the option to add, professional graphics cards (programs such as solidworks are virtually unsuable without Quadro or Firepro), ADOBE RBG screens, maximum supported RAM, more ports, secondary HDD, etc. Of course it would be bigger and bulkier but for those who really need it, it would be worth it.
There are form factor differences between apple's desktop consumer level and professional computers. A mobile workstation should be designed for function first then form.
I've still got a pair of 2011 17" MBPs. I'm not at all fond of their 'port array'. The USB (2) ports are to close together to use more than two at a time for most USB devices...nothing has really caught on with the mini or micro or express PCMCIA slots....the rMBP (15) nailed it. If not one more USB 3 slot....twin thunderbolt. Twin USB 3 on opposite sides of the computer, HDMI, SD, an audio in/out single jack. Finally the thunderbolt docks are out and reasonable....and allow a lot of high speed connectivity including USB 3, FW800, DVI and HDMI, audio, et al. Having two ports compared to the single in the 17s has come in handy for us
Well obviously overlook all the smaller computers which manage to cram more ports on a smaller chassis.
Sure. Now show me a laptop that uses them
The sony vaio pro released on the same (similar) date as the air using a PCIe based SSD. Before msata was released most ssd cards in laptops (not the 2.5" versions) used mPCIe.
http://www.mydigitaldiscount.com/runcore-pata-mini-pci-e-ssd
Here you can buy some older mPCIe based drives which were commonly used in netbooks (Dell Mini 9) before the msata specification was released. At this time due to NAND and controller technology limiting drives to 3 or 6 gbps had no effect on performance.
These drives are compatible with mPCIe.
Note: Due to their design, RunCore Pro IV T-Style drives require an available WWAN slot in your PC.
WWAN use mPCIe
The whole industry is moving toward non-replaceable RAM

No matter what the next gen of RAM will be (HMC looks nice), it will probably be fused on the mainboard anyway. As I wrote before, we are moving towards unified system RAM, where CPU and GPU access the same ultra-speed RAM over a very fast connection. And non-replaceable RAM further improves performance, power consumption and reliability.
There is no performance increase from soldered RAM. I am not sure about power consumption but most of the power used by the RAM is from the chips themselves not the interface. Trace length is virtually the same; the elimination of the slot will only have a minimal effect, if any, on power consumption. Likewise DRAM problems usually occur on the chips themselves. Fusing the modules to the motherboard simply means replacing the mobo if something happens (unless you want to re-solder traces which is much more DIY). Desktop RAM, when it goes bad, is mostly due to bad chips or a problem with the module, not a problem with the interface.
Well, that is precisely the point I have been trying to make. Its not a PRO machine. I am not even quite sure what this means, but a PRO machine for me is a mobile 3D workstation (e.g a Dell Precision). The MacBookPro (retina) is an very good all-round laptop which is very competent for most tasks but not particularly well suited for heavy duty workstation work. Which I don't see as a disadvantage, to be honest.
I agree.