At some point the Amiga becomes just a fancy keyboard attachment to something else 
This is very true and also very interesting to consider.
This is why I'm not interested in Towered A1200's with Mediators and PC cards to do all the work, where's the Amiga gone, are you actually using the original hardware?
If you think about, the expanded 'big box' Classic Amiga's also fit into this bucket, when you've got an RTG card, an AHI sound card and USB controller it's not really using the original chipset for much either. Adding a PPC card is another step away from the original architecture.
There's a fine line between 'enhancing' a Classic and just making it redundant and this line is obviously a personal decision.
For me personally, I'm happy to plug an 68k FPGA accelerator into my A1200 desktop and an FPGA flicker fixer with enhanced chunky modes but much beyond that and it becomes a bit silly.
Let's face it, a bog standard 2MB A1200 isn't much fun, they only become usable with a memory expansion card.
If I didn't have a Classic A1200 then I'd probably just use WinUAE to get my retro gaming fix (the cheapest option!).
The FPGA Arcade and other stand-alone computers are interesting but they are really only WinUAE in hardware form and I wouldn't get the same 'feeling' I get from using my (enhanced classic).
NG Amiga's are also part of this mix, they are 'expanded' Amiga's taken to the extreme.
I think when my Classic finally dies I'll just give up on hardware rather than switch to one of the alternatives listed above.
