Let me put some personal perspective on this.
I run my Amiga software now with a PPC G3 at 600MHz. Yes, it's a Pegasos. The whole setup cost me less than a modern middle-end PC - including custom tower and cordless keyboard and mouse. It isn't slow, not by any stretch of the imagination.
It takes 10 seconds to boot. IBrowse loads in a flash - literally. I can go from being powered off to browsing Amiga.org in less than 13 seconds. Absolutely everything I run on it flies - and that's without JIT. It is literally quieter than a whisper: the only fan is in the PSU. My AGP 3D card is fast even by modern standards and also needs no fan.
I have a UDMA hard drive that can load 38MB/s, 512MB of very fast RAM, and 64MB of DDR graphics RAM. I get 16bit 48KHz sound with no noticable performance hit. Needless to say this is total overkill: no Amiga apps in existence need anywhere near this spec. It eats Heretic 2 alive in framerate - and that's just in software mode. I can view PDF files faster than a 2GHz PC can. Every app I click on is loaded almost the moment I let go of the mouse button. It is truly the fastest feeling machine I have ever used, and I've used a lot.
AmigaONE owners need not feel left out. The A1XE spec is even faster, once they get a real OS to run, and not just Linux (which makes everything feel slow).
And best of all, I get to know that I have something different, something that's not just another bog-standard PC. And I love it.
Who the hell needs x86?