The most futureproof GPU in your opinion?

The future is coming, there is nothing that can be done to stop that.

I've always considered the high-end cards to be the most future-proof. Even with the 970's VRAM issue, it still is a very powerful card that can max out 99.9% of games at 1080p and even possibly 4K. The 980 is obviously capable of 4K (possibly even higher), but it's also über expensive. Still, that's not to say that the higher spectrum of midrange cards ( GTX 960 and 760 Ti) aren't future-proof as they can also handle maximum settings at 1080p.

I guess it comes down to what future-proof means to you because everyone has their own standards of when to upgrade. I personally game at 720p in Windowed Mode on 99.9% of my games, so my GTX 650 Ti is going to be with me until I finally get a 21:9 ultra widescreen monitor (maybe 2-3 years from now). The card that mine replaced was a GTX 465 which I had for 3 and a half years until I decided to go m-ITX and the card couldn't fit. :P

The 970 is still the best card for the money and will be maxing out games in 1080p/1440p for a while to come.
If you have the money the 980 is fantastic too.

I am still using a 760 and can max out everything at 1080p, except maybe a few very new games where I still get great performance.

Right now I'd say 970 despite the vram controversy and maybe the next amd card that's coiming out in a few months (april-june)

GTX 980. Better than the 970 and does 4-Way SLI, not 3-Way.

990 when its released. 980 for current released hardware. 970 is excellent, even with the 3.5GB controversy.

Nothing is "futureproof", only resistant or usable.

nothing's futureproof, but you can always get something relatively high-end and it'll last you a while.

There's no future proofing when it comes to computer hardware, especially GPUs. That is, if by future proofing you mean playing AAA games on ultra for years to come. ^^

Just buy a mid-range GPU and use it while you can, then sell it and upgrade to newer mid-range GPU.

The only thing that really matters are the specs. Yes, the 970 is not particularly well thought of, that does not make it any less future proof than any other card that gets similar performance. Lately, the Radeon cards have been getting great driver updates I hear, so in that way they have been more future proof, but they were sort of behind to begin with. I guess more to the point, Radeon is releasing that Mantle thing that will insanely boost the ability of its current and future cards.

But in the end, the most future proof card is the card that is cheap enough that you can afford to replace it.

Whatever I can overclock the most.