For those who are doing it, more power to you. It goes to show you how far ahead of it's time the Amiga was.. 15-20 years ago.
Yes, the hardware and software is outdated, but not the philosophy. What this does is show how such a simplistic platform could still be viable if it were still developed for.
As much as I hate to compare the two, the Mac actually shows what a modernized Amiga could do. Playing the "what if" game like we do so often, had Commodore not gone bankrupt and had they actually listened to their gurus years before, the Amiga could have gone head-to-head with Apple. Had they accepted Sun's offer to license the Amiga 3000UX... so on and so forth.
I will probably get flamed by the nay-sayers, disillusioned, and trolls for saying this. I've often imagined winning a lottery and investing several million dollars into Amiga development. Or even investing other wealth into such a project. But it can't be a small amount.
A full revival of the Amiga requires a massive strike in software and supporting hardware. Sun long ago realized the power of commodity off-the-shell x86 hardware when it ported Solaris, and then realized the demand when it discontinued x86 support, only to bring support back after the user back-lash. Apple did the same more recently.
Saying what I am about to say will probably get me flamed even more. For Amiga to make a true come-back, it would have to run on whatever crap can be bought at Wal-Mart, WorstBuy, CompUSEless, Radio Shanty, et al. Apple did it with OSX, and I believe that given an infusion of enough money and talent (management and development,) Amiga could do it, too. Again, it would have to be swift, silent, and powerful.
Productivity software would have to exist immediately, functionality and compatibility with existing Windows systems would have to be working immediately, games would need to be there right away, and none of it can be vaporware. History shows that vaporware and poor management has brought down many an advanced product.
Amiga would have to succeed where Linux is failing, and with the quickness. A secure version of AmigaOS with a security-enhanced filesystem (Reiser, EXT2/3, whatever,) strong networking, Windows networking compatibility (Samba,) secure memory architecture, a useful web browser (Firefox,) modernized email client (I believe YAM could fill this role,) productivity software (StarOffice/OpenOffice,) legacy game compatibility (give us nostalgia, dammit,) new games, standard hardware compatibility (maybe custom hardware to start with.)
Oh yeah, and use AMD64
