Final Fantasy X is getting an HD port to the Vita, as shown during the Vita presentation. This will be the first actual main-series HD port to modern consoles.
The Japanese release date is to be announced. There is no news on whether this HD port will be making its way to North America or Europe, but expect to find out in the coming months. Or years. You know, whenever SquareEnix decides to actually release, localize, and then release it again.
Check out some shots from the presentation stream over at Famitsu.