No, I definitely do not 'need' it, but I'd like it all the same.
Right now I have a 12 core cMP with 24GB RAM and 11TB internal storage (including 1TB SSD) but it'll be 8 years old next year, so I think I'm due a new one.
I've had desktop Macs since 1995 and towers since the original graphite G4.
I've basically owned every tower Apple has ever made since...what can I say...I like them and their expandability.
I upgraded my Power PC 7600 with a G3 card and even my beige G3 had the CPU upgraded with a quicker one.
My current 2009 Mac Pro 4.1, has been flashed to 5.1 firmware and the original 2x 4 core 2.26 Nehalem Xeons have been upgraded to 2 x 6 Core 2.93 Westemere processors and I have installed a flashed Nvidea GTX 680 running a Dell 32" HD display.
I've also a Blu ray optical drive and a USB3 and Firewire 400 PCIe card installed too.
All come in very handy and I use it mostly for running Logic and making music.
I've big sample libraries and so the easily upgradable internal storage is a BIG thing for me.
As is the big 32" monitor, which was only facilitated by the graphics card being upgradable.
That's why I love Mac towers.
That said I'm just a very passionate 'enthusiast' - I do not make a living from my Mac Pro, but then I think there are many other cMp users out there who are the same.
It's not just 'Pros' who buy pro gear.
From 2006 when the original Mac Pro was introduced, to 2012 the entry level price point for a Mac Pro was $2499.
To this day Apple have basically kept the price of the entry level iMacs the same as what they were back in the white G5 iMac days, give or take $100 or so, so I was really hoping the Modular Mac Pro would do likewise.
The price of the current Mac Pro is simply too high.
If this new one was to be $3999, that's be a rise of $1500 from the 2012 price and $1000 more than the current Mac Pro.
Such a large price tag really would be too high for many (like me) who couldn't justify such a huge sum and would make it the preserve of professionals and very wealthy only - and that would not be good for Apple.
Like it or not 'prosumers' are important too, but I think Apple need an entry level model at $2500 point for that to happen.
A $4000 entry level Mac Pro would be almost as big a failing as the stupid trashcan design of the current one, so I really hope Apple bear this in mind - the newly announced iMac Pro would suggest that sadly this is unlikely to be the case.
.