With the source code you could create an android / iOS version of UA (no DOS emulator needed). that would be pretty cool.
But it would need a lot of work, and yet for any game like the Goldbox series one could probably implement the whole thing in Flash; perhaps even include an [XML data?] editor for it too.
(Presumably it would be using different ~non-D&D artwork anyway, and would not need to read the original sprite files... and yet could be made compatible with the UA art templates.)
Here is a link to a guy that made a Diablo [proof of concept] in Flash
, so it's surely doable; I think. http://necromanthus.com/Games/Flash/diablo.html