Not what you expect to hear at the start of a new consoles lifespan, usually midway or at the end when PC graphics are performing a fair bit better with some stand out titles. Then again Microsoft have always struggled with PC gaming and pushing the limits of game developers in fear of cut out large chunks of their market who wouldn't be able to run the games at full spec (and thus feel disadvantaged).

Also they don't have any massive PC only games like others such as Blizzard, Value, etc 

http://www.neowin.net/news/microsoft-says-it-has-renewed-focus-on-pc-gaming-details-coming-this-summer