Arm already dominates the mobile phone/tablet markets, it's coming to servers and the desktop next. Freescale's iMX series is ARM successor to 68k, why not?
Of course it dominates the mobile phone/tablet markets. There's not much competition there. Servers and the desktop are another matter entirely.
Some people won't call it Amiga. I don't care what it's called, I just want a reasonable performance desktop PC that doesn't have all that crappy Intel x86 legacy inside it.
Unless you're writing an OS, or programming in assembler, you'll never have to see "all that crappy Intel x86 legacy inside it".
ARM makes sense. x86's days are numbered. PPC is as good as dead already.
ARM makes sense in situations where power saving is more important than performance. x86 will be around for a long, long time still. IBM, Freescale, and AppliedMicro would disagree with you about PPC.