IBM has announced a variety of PowerPC systems that it is gearing up to
support both AIX and Linux. Their goals include a desktop system below the
3,500 USD range.
See http://www.eweek.com/article2/0,3959,1197450,00.asp for details.
This looks like a great platform for QNX. I assume that the PowerPC is much
better at context switching than the x86 is. One would think that this
would be a good/better platform for QNX.