The lights are on
Sony confirmed MLB 13 The Show releases on March 5, 2013 in North America for PlayStation 3 and Vita. Some of the new features for this year's game includes an all-new Playoff Mode, which replicates an in-stadium atmosphere, and a new beginner mode. Additional details are being revealed at a later date.
The PlayStation Vita version offers the same upgrades as the PS3 version. You'll sill be able to sync your Season, Franchise and Road to the Show saves between platforms.
[Source: PlayStation Blog]