PC gaming is a bit anachronistic.
High highs, and low lows.
The "future" of PC gaming then is being pulled in both directions.
on one hand you have indie gaming, which is now making its way onto consoles, but firmly originated on PCs. We'll see how this goes. will consoles steal the thunder here too? Will they migrate to the console pie? I imagine this will largely be determined on how well the marketplaces are run. Gog, Desura, and Steam doing indie games a solid on PC. As well as the ease of crowdfunding via paypal, etc.
But these also are generally notable for very low system specs required.
Casual/social games. Mobile devices are generally included into PC gaming by the industry. android/apple, etc. and of course web based games as well. armor games, facebook, various browser games like maplestory.. Again, very low system requirements. This is obviously a market that will get bigger before getting smaller.
What sells on PCS?
Strategy, RPGS, causal. they make up something like 80% of PC gaming. while console games are action, shooters, sports are 60% there.
http://www.theesa.com/facts/pdfs/ESA_EF_2013.pdf
Its not that surprising, then when PC games tend to be highly multiplayer experiences. or causal games. that the graphical bar has been lowered.
The occasional single player rpg being the flag bearer. Skyrim, witcher 2 and 3.
Lowest common denominator also comes into play.
Laptops, etc. Crisis taught everyone a lesson. Build a game that can only play on 45k PC's, and guess how many of that game you will sell. (its not 6million)
WoW, and LoL, minecraft, etc however HAVE taught them. Pushing graphics doesn't translate into sales.
Good graphics are nice. but personally, I'll take Teamfortress 2 over Crisis any day of the week. Granted, there are limits. Diablo3 looked like shit.