I just read that there is a closed beta (sign up currently open) for Ultima Forever, a new apparently Free 2 Play Ultima VI remake.
Having already spent years playing Ultima Online I do not wish to even try it, also because it looks won't be a "new Ultima Online" but a freemium remake of a singleplayer one, with coop included.
Anyway, yours to test and assest if worth playing or not.
Some bits of additional info at Touch Arcade
Update: Details and even a few screenshots at a RPS interview.