The PlayStation 3's Remote Play might see some renewed use once PlayStation Vita is released. At Tokyo Game Show, Sony showed off what Vita could potentially do with Remote Play.
For those unfamiliar with Remote Play, it allows a PS3 to stream media, applications, and video games over a wireless or internet connection to a PSP. Gaming-wise, the feature was supported by very few PS3 and PSN games due to the PSP's lack of extra trigger buttons but with the Vita, the rear touch panel can be used as a subtitute for L2 and R2 triggers. To demonstrate this, Sony showed off Killzone 3 being streamed over Remote Play.
Vita also has two ways to handle its Augmented Reality function. Wide Area AR is similar to how the 3DS handles AR with marker cards, except Wide Area will continue to show an object or character even if the card is out of sight plus Wide Area has the benefit of supporting multiple cards at once. Markerless AR forgoes the need of a card entirely and simply allows the user to tap on the Vita's screen to make an object appear.