I think the current prevailing attitude of "I'll be dead when it gets serious, therefore I don't care" is a dangerous one, but one which, crudely, I guess you can't really condemn people for having - if they choose not to take heed in the topic, then that is up to them at the end of the day. While the Kyoto agreement has been elemental in getting the ball rolling, the targets should have been much higher. Alot of people live very luxurious lives without even knowing it, and if relitively minor sacrifices were made on a national scale, I think this is a problem well within our grasp of solving.
Although the melting ice caps and general temperature rise is a worrying issue, I've heard that the most important issue, as mentioned by boris, is how the gulf-stream will be disrupted, but sadly I don't know anything about that in detail.
This is probably misguided, but personally I think the depletion of the ozone layer is more concerning at the moment.