I bought two 7800gtx in sli a few years ago, so new I had to wait a couple months on them. That cost me >$1000. More than a year later I let Steam survey my system and I was in the top 3% for GPU configuration. A year later, there were dozens of single cards that outpaced my two. I'd guess a lot more people SLI nowadays, but I am affiliated with a few clans, probably close to 150 gamers and don't know one single person with two high end cards in sli. For 99% of all gamers, why spend >$1000 when you can play everything on the market for $150 - $300? Same argument for tesselation, 3D and such. Great when it makes financial sense or if you have nothing better to spend your money on. That is the point that Nvidia is missing.