This is fantastic news and I'm very excited for Frank Klepacki to return. Those original themes and tunes were stellar.
In a way I hope they update the control schemes more than the graphics -- they're kludgy by modern standards, and I think it would be hard to enjoy the nicer-looking game if it controls the same as before.
I think the developers who 'remastered' AOE2 struck a very nice balance between improving usability (high resolution displays, etc), minor graphics changes that still keep the nostalgia alive, and adding new content (new civs, units).