The Amiga was THE Amiga. A rehash of a modern PC with the Amiga label on it would not attract me in the slighest.
Developers would, I think, only be interested in a new Amiga if it was easy to port code across, but then you come to the arguement of whats the point of a new computer that does what a PC can do?
Also, would the computer have off the shelf components or would it be custom chips again? a) who'll be arsed with R&D for the chips and b) off the shelf is just a PC.
I'd stick to my PCs and keep the fun memories of the Amiga's day.