Nvidia sure likes to point the obvious. The power is not the most important factor on pc for me. It is the diversity of titles and convenience it provides in terms of value and backwards compatibility.
If you look at some of the biggest titles on pc. They are not really graphic intensive. The Minecraft's, World of Warcraft, Valve games (TF2, L4D, Counterstrike) can all be played with mid to low end gpu. You need a Titan to enjoy pc gaming.