Maybe the handheld console which can plug into a TV could exist in the market place still?
Look at the "Atari 2600 Flashback" in the marketplace.
It would depend on the price point. I think there is still room below the PSP price bracket

Here is my random thought on the future of Amiga. What if an Amiga OS (AROS for example) were to run on x86 architecture but with amiga specific PCI daughterboards etc?
That way you want a A500/A1200 platform, plug in the 68k card, like what has been done with the SID chip etc.
That way it runs on x86 hardware but you can get more of the Amiga feel if you cough up for the amiga hardware that you want.
Just my random thought