This is the only thing that matters. (not going to discuss your other claims ...)
People have been talking about the "post-PC" era for a long time. I don't see this happening (soon). Instead, we're seeing additional device classes emerging (smart phone, tablet, ...) which have their own strengths and weaknesses and their own vendor lock-in, if you will. I can't imagine running a flight simulator like DCS on anything other than a powerful desktop system with specialized peripherals (TrackIR, HOTAS, ...)