I think Dig has a good shot at becoming the defacto emulator frontend in the emulation community, but it seems to me that the project could benefit a lot from a development model like that of Retroarch, i.e. multiple contributors hacking away at a variety of things. Would you (author of Dig) consider it? I'd certainly be happy to contribute if the option was there.
There's the question of premium and funding development, but I think in general the Retroarch folks are doing well with donations and feature request bounties, so that's something that could be considered.