Yeah a 84+CSE emu would be nice, although so far, there are supposedly no accurate emulator for the computer yet, so to run ASM games it might be useless. jsTIfied totally messes up my games and AssemblyBandit's. Not sure about TilEm but 84+CSE support came out before the 160x240 screen mode was discovered and I wouldn't be surprised if it was based on jsTIfied.
A TI-89 emu would be nice as well. Calc84maniac started working on one in 2010, but then lost his entire progress in a laptop failure. Not sure what ever happened to Jacobly's Z80 emulator. IIRC it wasn't too bad, but I'm unsure if he fixed For loops yet.