Sony's had limited tests of its cloud-based gaming service running for the last few months, but it's taking PlayStation Now to the next level tomorrow by letting anyone with a PS4 (that's in the continental US or southern Canada) join in. There's a new blog post and video up now telling gamers what to expect: PS3 games, cloud saves, trophies, and "a variety of rental periods" depending on the game. As far as an all-you-can-eat option following the lead of Netflix or EA's just-announced EA Access -- that Sony doesn't think you need -- Sony reaffirmed that it's working on a subscription option for PS Now, but didn't provide any more details. As for how much it costs now, there will be four-hour rentals for $2, as well as 7-, 30- and 90-day options for between $3 and $20, across a library of more than 100 titles. You can check out our hands-on impressions from CES after the break, or check out Sony's website for more information like which games are available (Metal Gear Solid V, Ratchet and Clank: Into the Nexus, Ultra Street Fighter IV and more.)