If you have seen the Sony's Conference footage in New-York, NY USA today, the PS4 has a target of the Holiday quarter this 2013.
Which means I predict September to November as the months they can target best. I think that November is most likely.
As for games on the new console; Knack and Killzone: Shadow-Front on PS4 looked amazing and showcased the raw talent it has to offer. There were other games demoed like Ubisofts Watchdogs and spoofs of Final Fantasy from Square-Enix and Bungie's Destiny for the upcoming PS4.
Blizzard has made its presence known once again to us in the PlayStation Universe, reminding us of their humble console/system roots. Chris Metzen Senior Vice President of story and franchise development of Blizzard says that they want to bring games such as Diablo III to you from the comfort of your living room couch and that they are passionate about console play, they have held back because they said "how do we do this?" and they finally have an answer, as the famous PC series returns to grace us on both the PS3 and PS4- Blizzard looks forward to seeing us all across Tristram and in future games from them.
CNET on Sony's Partnership w/Blizzard:
IGN News Coverage:
-Watch the PlayStation Event Live on IGN-
-PlayStation 4 Price, Release Date Reportedly Outed-
Sony Reveals PlayStation 4 Controller: DualShock 4
-PlayStation 4 Revealed-
-Sony Details PlayStation 4 Processing Specs, DualShock 4, and Eye-
-PlayStation 4 Coming Holiday 2013-
For more on all PS4 news by IGN see it here:
Join our #PlayStation2013 conversation Q&A:
1] So what do you all think of the new PS4 so far?
1.A] Despite the lack of hardware presence, the reveal is likely saved for E3.
2] What games have you excited?
3] Or what game titles do you want to return on PS4 from PS3?
4] What do you 'want in' or 'think of' the new PS4 features?