The PC market still exists , IMO, look at STALKER, Battlefield series, Crysis series, AOE series, The SIms, Bioshock, COD series and the list keeps going on . These games did well on the PCs, some of them only on the PCs.
Add Witcher etc, no royalty to Sony or MS, lower dev costs. many have made themselves big on the PC market.. like Crytek..