Re: MysterD and performance to say 'cards like the 900 series exist,' well, they were released... what... six months ago? Less? To release a game expecting more than 20% or so of your customer base to have the absolute latest video card is unrealistic. And while it's true the 780 and 780ti's have been out for awhile... again... you're talking maybe the top third at best in terms of people who have those cards.
I think w/ new consoles here, this is going to be that push to make PC gamers who ain't upgraded GPU's in quite a while (like myself) or are in that situation of needing to build a new PC - to do so and be set for quite a long while on the PC. I think this is that spike, that can cause gamers - those don't have a GF 770, 780, 960, 970, or 980 or any of the AMD equiv's - to aim for those realms.
The next-gen of consoles is here and it is pushing our PC specs way up in terms of raw-power (since the companies likely ain't using the PS3 + XB360 as the low-end anymore - it's now XB1 + PS4 as the low-end system) and many of these newer PC games (especially in the AAA arena) are pushing for 2GB+ cards for recommended specs (see Wolf TNO, Dying Light, Far Cry 4, ACU, SoM, Ryse, etc) - I only see the specs for especially newer AAA titles on PC now going through the roof for a while.
I ain't had to worry about running any new games since building a new PC in May 2011 at my preferred settings (1080p, have it look acceptable to me, and hitting a stable framerate somewhere that I could lock somewhere b/t 30-60 FPS), until the last few months - when this sudden spike + increase in specs happened. Watch Dogs is really the first game here to push my PC.
This trend is very similar to what happened, when the X360 dropped and PC-versions of the same games decided to increase immensely all of sudden in PC system requirements.