Sure,
Metro. Less $ on visuals = eliminate the need for a "traditional" PC for gaming. No other demand in other segments (business people are shifting their needs to tablets and phones quite rapidly) = no more box + kb + mouse + screen. It's shifting to all-in-ones (touchscreens) and portability. It's an inevitable trend. That, to me, simply spells a paradigm shift in the nature of how gaming will be done on what we someday call "PC's".
But I'll go ahead and make an argument against my own conclusions. With the further advances in ASIC's and APU's, along with that continued startling elimination of space and cooling, that's going to bring cost of production down, it's going to further encourage more standardization, and thus begin potentially eliminating two of the most annoying things about traditional PC gaming: the need to constantly upgrade, and the unpredictable nature of compatibility, cross-platform, etc. This is actually a good thing.
I can imagine a small little NUC-like PC located somewhere centrally in your home or room, with still-traditional input devices wherever you want them. Everything wireless, everything easily broadband, everything extremely well QC'd and no longer a hassle. This should allow developers to focus less on deciding which platforms to cater to and allow them to keep this thing going. Great, right?
I just don't know if I'm ready for that, though. It's like the transition from old-school, easily-accessible V8-powered muscle cars to what are essentially impossible for the backyard mechanic to work on futuremobiles. You need in many cases very specialized tools to even diagnose a simple problem in them. It's just not the same.
Edit: Oops, honestly didn't know Steam wasn't public. Point still stands, though.