We've all been crying for a new cube since the mini came out... is the mini an awesome machine? Absolutely, I love mine. But there is a market for a headless iMac/Cube/MacPro mini... people like me. I don't need a quad core computer. I don't need 16gb of RAM. I don't need 4 harddrive bays, or even two optical drive slots.
I do want a fast CPU, an upgradable GPU, a couple of full size HDDs and a full size optical drive. I also want something quiet, relatively affordable (something a bit less than an iMac would be idea), and stylish.
I don't think that Apple would lose Mac Pro sales to something like this - they might lose iMac sales but if the margins are the same for them who cares, and any loss of mini sales would be upsells, so it'd be a good thing.
I think a lot PC types, especially gamers, would be interested, bringing in new markets... None of my gamer friends would be satisfied by an iMac, but neither would they shell out $2-3k for a Mac Pro.
Let's see, the mini is 6.5x6.5x2 inches, would anyone even notice if it went to 8.5x8.5x4? Even better would be 8x8x8, just for the cube dimensions, done in iPod white (or black), would look stellar on a desktop. Core 2 Duo 1.83ghz, 4 RAM slots for an 8gb max with 512mb installed stock, 1 16x PCIe w/ 7300GT base (BTO options), 1 PCI slot, 2 3.5" drive bays w/ 160gb standard, 1 5.25" bay w/ SD, AE, BT2, 6 USB2 (4 back, 2 front), 1 FW 400, 1 eSATA (in place of FW800)... $999 anyone? BTO options for slower/fast CPUs and GPUs, more RAM, bigger HDD and a $200 TV tuner/video encoder breakout box...