Short of super cool ideas for new VICE features? I got one that I hope will raise some interest.
Let's face it, VICE emulation is really feature rich, exact and rewarding. The next big thing in emulation should be realism. Scanlines and CRT emulation are very nice, but there's something implemented in MAME (stable) that really makes a huge difference in screen rendering: HLSL filters.
It looks as impressive as this:
Why not implementing them into VICE and have the screen look like very close to a real CRT? It will look definitely amazing.
All references are in MAME sources