Like many others, I own a C64 DTV (
http://en.wikipedia.org/wiki/C64_Direct-to-TV )
I like both the C64 DTV and the concept, but would prefer to have a similar "Amiga DTV" based on the Amiga 500.
Alas, they don't exist yet, but why shouldn't they? But based on the experiences with the C64 DTV it should be designed with some important changes in mind:
-It SHOULD be able to read external adf-files, either by having a sd/microsdcard-reader and read from this like a floppy emulator, or by having a usb cable enabeling it to easily connect to a computer and replace some internal storage with custom adf files.
-It SHOULD have a joystick port allowing it to connect a second vintage joystick or mouse.
With these changes, I think a lot of people who used to own an amiga would like to buy it.
If it just has some preinstalled games like the C64 DTV it will not be as versatible as it should be, most people would like to play the games that THEY used to play anyway. In my opinoion it doesn't have to come with any preinstalled games at all (but maybe it should, for the non-geeks).
A lot of the fun for many players was the two player games having a joystick each, (hello, International Karate on C64 DTV with just one joystick? Boring), and a lot of games are mouse-based, so a joystick/mouse port should be essential. I guess that a lot of the people buying an Amiga DTV would have some spare joystick/mouse from the old days anyway, and if not then there would always be some available on ebay.
So, how about the hardware? Amigas are more complex than C64s, so it would also be more expensive. I guess it is possible to emulate all the chips with fpgas, but in my opinion, if it is easier and cheaper to just make a custom version of some UEA emulator that may be run on some chip that fits in the joystick, then in my opinion, this should be the way to go. As long as it has the power of the amiga in a joystick, and can play all the old games on it, I don't really care exactly how it is done hardware/software-wise.
I guess an Amiga DTV could easily cost twice or more the sum of the C64 DTV, but I would like to buy it anyway (at least if it has my two prerequisites).
I think such a device could sell really well, what do you think? Who knows, if enough people should show an interest in it, then maybe someone would decide to make some one day? ;-)