I like PPC for the same reason I like most things: variation. I don't regard it as a "must-have". As long as it has the performance to run old apps "better" and new ones adequately I'm not really bothered if there are x86 processors that are far faster. I can, and do, use those just as happily with a different OS.
What I find rather dull is the thought of the day when there is only one hardware platform left and only a choice of OS to differentiate systems.