Here's a suggestion which came to my mind when I saw the next update preview with a mobile / dynamic reveal tool on a character token.
An additional functionality based on Hide / Reveal function representing Light / Obscurity would be something useful.
It would be also interesting to assign tokens the possibility to have an "aura style" light effect (to simulate torches, lamps etc). A moving token character would then reveal areas dynamically but also enlighten them. It would allow the DM to place new items, tokens or even maps (for a moving/changing room) without players seeing it in a dark area, though revealed. Not sure to be clear...
