Ummmm, well there isn't much coming out for the PS4 1st party wise for the rest of 2014. But I hear Infamous is pretty good and then there is the Last of Us in July and then Driveclub. If I were you I would've kept the Wii U and saved up for the PS4. But I understand you said you don't want more than one console.
Edit: forgot about Little Big Planet 3