What I'd love to see...
I have been waiting for a Mac Mini upgrade for some time. I want to make the jump to HDTV, and other upgrades... but I want a computer that will REPLACE components, not just add another component, like AppleTV does.
Here is what I would like to see, and if apple comes close, I will be happy, and buy one.
1: A slightly more versatile case design. The mini looks nicely minimalist, but it is not very upgradeable without a puttyknife. Shouldn't be necessary. From the company that brought us the G3/4 series cases, and the G5/MacPro cases that are all VERY simple to open. Even the G4 Cube was easy to open if you disconnected it, and turned it upside-down. I would not have a problem with a slightly larger case, within reason. It should still be quiet, and should still be elegantly simple. But also simple to open.
2: Brought up to date. Penryn, and Nehalem-ready, or whatever the near-term approaching, easy for Apple to speed-bump. Maybe even Quad-core optional, at a price that comes up into iMac territory, for a headless computer below the MacPro. Perhaps BTO only for quad-core. I would settle for Quad-core compatible for third party upgrade.
3: DDR3 RAM, up to 8GB or even 16GB (4 RAM slots x 4GB modules) capacity, for future capability. Apple doesn't need to configure it with that much RAM at the time of sale... but the mere compatibility would be a good thing. Maybe they only sell it with 4x512MB (2GB), or 4x1GB (4GB) configuration, but if someone wanted to spend a boat-load of cash for 4x2GB (8GB), or 4x4GB (16GB), the computer could address it and use it.
Plus it would be less expensive to offer 1 or 2 gigabytes of RAM on 4 smaller capacity, cheaper modules, instead of only two, or one, and probably can take advantage of paired memory schemes. than a single, or un-matched pairs.
4: New NVidia subsystem and graphics, of course. Similar to MacBook and MBP, low option for base graphics, upgradeable to HybridSLI, or whatever they are calling the switchable video system... OR at least an option for a nice dedicated GPU system. MiniDisplayPort for compatibility with new Apple display. MiniDisplayPort adapters to VGA, DVI, or HDMI, Dual DVI, or Dual MDP, to run dual monitors, apple or otherwise. It is ridiculous that the only Mac that can run dual matched monitors is the MacPro.
The option should be there for video performance and dual displays at full speed, or to down-option it for headless use for less money.
5: Ports. All the essentials. USB, of course. E-sata AND FW800, preferably on a chipset that can just be enabled to run FW1600 or 3200, either right away, or at a future date. FW800 is the base, and FW400 users can port-adapt to FW400 devices. It would be nice to have FW400 and FW800 ports, to maintain separate bus speeds, but if I have to choose one, FW800+ has to be it.
It has to keep audio in/out hybrid analog/optical digital. It has to replace my AirPort Express, hooked to my optical-input home theater audio receiver.
It should of course have bluetooth and Wifi-N standard, as well as Gigabit Ethernet. It should have software that can allow the machine to receive AirTunes, and Video streams from other computers on the local network. A SUPER AirPort Express/AppleTV.
It also should definitely keep the IR port, for FrontRow and other home-theater options.
All the things that would make it a GREAT media machine would also probably make it a nice headless desktop, and nicely externally expandable headless server.
6: SATA internal bus.
two drive bays. One for a 3.5" or 2x2.5" hard drives. The second drive bay for an optical drive, or to repurpose for at least one more internal hard drive in place of the optical drive, and a little plate to block the drive slot. I am not sure one could fit two 2.5" hard drives in place of a laptop-style slot-loaded optical drive.
One could run
1x3.5", and 1 optical
2x2.5", and 1 optical
1x3.5", and 1 2.5" instead of optical,
or 3x 2.5" hard drives internally. In addition to external expandability.
Optical drive should be an optional BluRay drive, and HDCP compatible system, to output to an HDTV via MiniDisplay port adapted to DVI or HDMI.
Or you can BTO remove the optical drive, and run optical drive sharing like MacBook Air, to lower costs and moving parts. A headless server might not even need an optical drive at all, if the initial setup can be done by borrowing the optical drive of another mac, like MBA can, or use a removable external optical drive via e-Sata, Firewire, or USB2.
I think the machine should be very configurable, with a good hardware base. Drive systems, and video subsystems should be variable from absent or very basic, to fully involved for a media center or desktop system.
It CANNOT lose firewire, like MacBook did. One can argue for space and power conservation in a laptop. (I still think it was a mistake for MB to lose Firewire, though)
In a desktop, especially a versatile one, it becomes less of an issue of space, and no battery life consideration. Such a mini desktop might actually take up a slight bit of the slack of the people who want a portable little computer with some audio and video capabilities. it isn't a laptop, but if you have the equipment, displays, and peripherals in more than one place, a small box is easy enough to tote between work areas.