After saying yesterday that it may not come, Blizzard has confirmed it will provide remote play support for the PlayStation 4 version of Diablo 3 allowing the game to be played on the PS4 through the PS Vita.
Blizzard confirmed it on Twitter:
"Will Remote Play on the PS Vita be available for #D3 Ultimate Edition on #PS4?" The answer is yes, and it's awesome! pic.twitter.com/Rg059nXZMF
— Diablo (@Diablo) November 12, 2013
It will be coming to PS4 next year complete with the expansion pack.