I think, it could be nice to have feature in store's search filter to include/exclude games that run on officially supported OS not natively, but via some sort of third party software (will it be dosbox, scummvm or whatever snk uses). Because often these are listed to be only windows-compatible (probably due to licensing limitations), while emulator itself runs perfectly fine on osx, linux and even android devices.

Overall - if you have the same opinion, vote for related entry in community's wishlist:
https://www.gog.com/wishlist/site/filter_store_entries_by_emulation_used_dosboxscummvmetc