If you think about it, some of the most groundbreaking games in terms of online mulitplay and even graphics have actually been PC games. WOW, Crysis etc.
Right now the suit game industry is focusing on consoles because they are easier to develop, and they are catering to the "casual gamer". Games are becoming mainstream so the focus is on the average joe. Much like AOL was the internet to many who were new to this whole internet superhighway thing.
Those things change. Whats new and exciting to the casual gamer will become common and many of them will discover more indepth so called niche titles or franchises OR console games will become more indepth and hopefully match many of the great gameplay attributes of many great PC titles. You already see consoles slowly becoming more networkable, built in nic's etc. They are little PC's in sheeps clothing. Enthusiast gaming will never die, its just going through changes. PC games will be mostly enthusiast oriented but I see the two merging someday. Eventually the day may come where someone on an XBOX can play on the same server as someone with a PC.
Also many of the new big secretive ground breaking game companies working on secret projects are catering their games for the PC first. The Project Offset's, The Red 5's etc. These people are working on some crazy insane game tech and its not catered to consoles initially.