Sony has already admitted that AAA for the Vita is pretty much toast. A possible leaked schedule shows not a single Vita glimmer of light in a sea of PS4 powerhouses. So, apart from an indie and JRPG sizzle real, there's likely little reason for Europe to stay up late to listen to the dronings from the west coast.
The press event takes place at 2AM UK, 3AM Europe and if you're lucky enough to have a PS4 will be a stream of delights. About the best you can hope for is a price cut, which won't do much for sales, leaving Sony to flog the Vita as a PS4 remote play gizmo. Of course, I seriously hope to be wrong, but I'm not going to lose sleep over this one.