I'm not a PC person, I'm a Mac person, but I've never had problems burning a DVD and doing other things on OS X, surfing the web, playing a game, never really thought about it, just did it. The other day I was cleaning some audio using iZotope, burn a PAL HD video using toast, surf the web with Safari, have Grand Theft Auto running in VMWare and Civilisation III on the Mac side. I could switch between them seamlessly.
The real advantage of x86 is that it is the architecture of the PC, all the computer development that has gone into it is available to you. That's a strong advantage, that's why Apple switched, the best, most powerful hardware is there, always.
Yes it's easier for Amiga to stick with the IBM chips, but the cost is over priced under powered machinery like the SAM. That was a major issue for Apple because it wanted to be a player in the computer world. It may not be an issue for a niche machine like the Amiga.
