While it has taken some time, HD remakes seem to be catching on. As of right now, the only officially announced HD remakes on the way is the Sly Cooper HD remakes.
Ubisoft looks to be getting in on the fun though as Amazon France has two listings: one is Splinter Cell Trilogy and the other is Prince of Persia Trilogy. Both titles are listed for the PlayStation 3.
Of course, neither of these titles are officially confirmed. Seems a bit odd though. Splinter Cell: Conviction was a Xbox 360 exclusive but, if these listings are correct, the trilogy is a PlayStation 3 exclusive.