Sony are planning to launch the Gaikai PS3 streaming library next year, at least in North America anyway. They’ve previously stated that it may take some additional time to come to Europe due to poor broadband speeds not living up to the requirements.
A selection of titles will be available at launch – no word on which but presumably “the best” PS3 exclusive games. Shuhei Yoshida, president of Sony Worldwide Studios also says that it’ll be like Netflix, with a “decent” number of available games.
These games will then be able to be played on the PS4, PS Vita and even the recently announced Vita TV, though there’s still no word on when Europe will receive this library of games.