Yeah, there is still a lot of progression margin available for MAME, for starters.. franxis is doing a great job and it already supports approx 800 games, if I'm not in mistake, but there are probably WAY more that could be supported yet.
SNES still needs a LOT of work on it, Genesis/Megadrive is going VERY well but there's still minor things to be fixed, not to say games that aren't working on it yet and could be - I think WarmFluffyUK's compatibility lists will be quite handy for emu devvers (check it out on
http://www.berzerk.co.uk/gp32) coz it should have a list of non-working games which could be helpful for the devvers to find out what's still missing or going wrong. We're thinking of upgrading that list to more and more systems gradually - any definitive rom lists for systems emulated by the GP32 would be appreciated - and eventually get a good TOP to match gp32spain's and more accurate.
And of course, people have referred to atari lynx and bandai's very own wonderswan - they do need quite a lot of work yet - wonderswan doesn't even have sound yet - and a lot of other systems could need some work / support for more games yet as well, and there's those older systems for which there aren't even any emulators yet - such as many 70s and 80s systems that most people never heard of and could make out interesting entries to future competitions. Just check one of the several pages about console history and just count and pick'em.
Everyone's dream would surely be Amiga and MS-DOS emulation, but I don't know how possible that would be, but don't forget MAME was a dream until not too long ago too!!! Maybe it just requires some good programmers working on it and cooperating. But these two would be the ultimate challenge, I would even suggest there would be a compo for that with good prizes and a six month long deadline or something that could encourage teams (so there wouldn't be battle over the prizes if there was only one) and see what people could come out with! Anyone would second that suggestion? AMIGA AND MS-DOS EMULATION CODING COMPO FOR GP32 support group
It won't be over any soon, I guess, unless most people abandon the GP32 scene.
On the other hand, with people such as franxis, ryleh and reesy (not including many others and I apologise for not including but would be a very long list) which have been working so hard for all of us, the GP32ers, and with incentives such as the many coding compos around and the clicks4devs' project, as well as the private donations many of us do to those hard working people, there will still be interest. And don't forget the GP32 will be OFFICIALLY launched this month in Portugal - my country -, Spain and France by Virgin (and I'd expect other countries will follow) so there'll be a lot of new blood coming to the scene soon. We just gotta steer them to the right way.
Last but not the least, we could all try to contribute to the scene, I am a total illiterate on coding but am gonna start learning in a couple of months' time, and emulation is definitely - although the most widely appreciated - goal for the GP32, but not the only one. There are tons of good games, possible ports, apps (Flash and PDF support are still small babies, for instance). Just think about it!
Sorry for the long post but I wanted to leave my opinion
PS: fDAY will ROCK