PlayStation Now, the game-streaming service borne of Sony's Gaikai acquisition, is officially trickling down to PS Vita and PlayStation TV. (An open beta launched last October, but this is the official premiere.) The "Netflix for games" service already exists on PlayStation 4, PlayStation 3, and even select Samsung smart TVs.
Though it originally launched as more of a (pricey) rental service, PlayStation has been shifting the focus to its $19.99 subscription option — including a UI overhaul to emphasize that point. It's still a somewhat hard sell given the relatively small library of older games, but there's a seven-day free trial (which doubles as a way to make sure your connection is consistent enough to enjoy).
Five new titles are also being added to PlayStation Now, which Sony is now boasting has over 125 titles. The big one is the frenetic God of War 3, so be sure to have good latency before trying to playing the later stages. Other new games include Dynasty Warriors 8, MX vs. ATV Supercross, Bomberman Ultra, and The Last Guy.