Normally, we wouldn't care so deeply about merely the genre a developer was working on, but since the developer in question is 2K Boston - the team behind BioShock - yeah, we care.
Because rumour has it - and has had it for a while now - that Ken Levine and crew are working on a new X-Com game. Whether they are or not, nobody knows. But if they are, that game is a shooter, with job ads for the company revealing that 2K Boston's "next big project" is "an unannounced shooter".
Who would have thought that the company behind one of the best shooters of the current generation would be working on another shooter?!?