yes terminal emulator, is just that. an emulation of a terminal(externally connected PC for example)
also, as far as stability goes, i have noticed the update helped with speed. battery, negligible.. i use the **** outta my phone, so my battery always sucks.. i seriously have like 5 chargers..lol
but the snesdroid app, is the best thing since sliced bread. lol
nothing cooler than playing starfox, street fighter 2, etc.. just wows the general public.
i make money off of installing the roms for people, onto their phone, because they are too simple minded to figure it out.