I suspect vitux is implying that being PowerPC it could be used in future Amiga developments... Being based on PowerISA it should even be backwards compatible!
But IMHO, the problem for the "Next-Gen Amigas" isn't their power - AmigaOS is probably lean enough to be usable even on lower powered systems... the problem is that the niche for NG users is getting smaller by the day (that equals less developers) and almost nobody wants to buy a $1500 motherboard with two 64-bit quad-cores just to run a few ported apps on it!
I suspect that there are probably more active developers for 68k than PPC
The only "big" advantage PPC has over 68k is that you can easily port stuff from it from the other modern OSes.