Several sites are reporting on a possible port of the Realta Nua version of Fate/Stay Night for the PS Vita. On sale Nov. 29, 2012, at 6300 yen. Kadokawa Games will publish it. Ufotable will make video cutscenes. Here, here, here and here are the sites supporting my report.
Will this influence you to buy a PS Vita? The Vita's sales won't be helped by this, though. Little Busters! Converted Edition had no effect, so neither will this, probably.
P.S.: On an unrelated note, I'll make a topic about the latest handheld war on the Miscellaneous forum.