While he's "not ready to announce anything" just yet in terms of consoles or what studios are working on said prototypes (People Can Fly? Chair? Internal?), he said that the PC is now the company's target platform, rather than a recipient of ported console games.
I followed up with Capps after his talk, where he added that both People Can Fly and Chair are part of Epic's "big happy family," though wouldn't put any of the projects to one particular label. He also confirmed that the recent job listing on Epic's website is relevant to these five unannounced projects in development at the studio. The "Samaritan" tech demo, however, is not one of them.