That Bioshock tease? It was for an iOS port
Remember the tease from 2K Games about a return to Rapture? It was for the newly-announced iOS port of Bioshock.
We're as disappointed as you are.
The iOS version of Bioshock is due this summer and is a complete port of the original game. According to hands-on impressions from Eurogamer, visually it's been downgraded and the controls are a little fiddly.
There's an impressions video on GameSpot too, which also pretty much says it's unplayable without a proper console controller.
The Vita version of Bioshock was canned some time ago, remember. As was developer Irrational Games. So we can probably kiss the franchise goodbye.