The ps3 makes for a crappy computer, 128mb ram and chock full of lockdown. Xbox and wii, no better. High performance computers already exist, they are called pcs and macs. A free and open source amiga OS already exists, and it's not run by idiots, it's called AROS. I'm on the dev mailing list, it's been blowing up my mail box with activity for the past 6 months.
With all the AmiDream posts I've been reading for years, its shocking that AROS doesn't get the love it deserves. It's the AmigaOS that runs on platforms that already exist. No dongles, no weird hardware, and most importantly, no freaking corporation to drive it into the ground.