I'm sure the Activision merger had a lot to do with it, but I think the rampant success of World of Warcraft has inflated their ego. The way they released Starcraft II content leading up to its release was done with a tone of "Feast your eyes on yon game! We, Blizzard, have made it, and therefore it is good!"
Indeed, ever since the merger, the dev posts on the forums have shown how full Blizzard is of themselves now. Responses by the dev team to complaints by wow players have acted as if it's not Blizzard's fault, it's the players fault for understanding why they changed aspects of the game. I love the healer changes they made, but the attitude of the devs about the changes to the game have caused me to cancel my subscription
Of course, you'd be limited by the amount of energy you can harvest from sunlight, but that's really a problem no matter what you do, in the longer term...
sunlight alone doesn't generate the kind of heat needed to run this process. It would take something closer to nuclear reactions to generate the heat that would allow the Co2 to be used in a closed loop. Some day there may be fruition, but that possibility seems farther and farther away every day.
"Time is money and money can't buy you love and I love your outfit" - T.H.U.N.D.E.R. #1