Same as wolfzero here, long time console player switched to PC recently with my first build. I've played everything from the original nintendo and sega to ps3/xbox 360. I do not plan to get the ps4 or xbox one (I still have and will keep my ps3 but I use it for netflix and watching movies/dvds now).
The idea I liked about consoles was that they were relatively affordable and provided amazing graphics. I remembered the shift in graphics from n64 to ps1 to ps2 and then ps3. They were nice jumps and the ps3 at the time it came out could compete with PC's over $1,000 for much less. (Partly because sony was selling the system at a loss expecting to make up the difference in accessories.) But the jump to ps4, its only equal to a graphics cards costing $250/$300.
With my pc now, granted its a $700 dollar graphics card, with the 780 ti, it blows the ps4/xbox one out of the water and should stay relavent for a good 3 years. PC is more fun to me, I enjoy the customizability of the keyboard and the free movement of the mouse. Games are more fun too. I replayed Skyrim on the PC after playing it on the ps3. It felt way better, also liked that load times were 95% quicker about 1-2 seconds on pc compared to 10+ on ps3 at times.
If I really wanted to now I can just run a hdmi cable from my pc to my tv which is only 10 feet away, and get a wireless controller to plug to the pc and theres my next gen console. Also I'm not sure what steam machines are trying to achieve, I can just plug my pc to my tv and run steam.
Also stores not carrying PC games is no longer a valid arguement. You can say the came about CD's. I remember when walking into best buy there would be 2-3 aisles of pc games and like 8-10 aisles of CD's. Now PC games are gone and CD's are down to maybe 1 or 2 aisles tops. Last physical disc game I got was age of empires 3 about 4-5 years ago. Last 30-40 games I purchased were all digital.
Also I remember reading an article a few months back, that spoke with one of the executives at sony, who stated consoles only had about 2-3 cycles left at most before they were gone, that included the ps4.