Sony only recently announced its cloud-based game streaming service, PlayStation Now, and it's following up on its promise to launch a limited beta in January.
Emails inviting select users have started showing up. There doesn't appear to be much rhyme or reason to the process, but you might want to keep your phone handy if you want to redeem it right away.
The beta itself has not yet launched.
If you get in, let me know in the comments, and make sure to share your experiences later!