Id be much happier if they were releasing something like physx instead of something like this.
I would have to say this has a lot more use reach than physx currently. The games that physx supports, the change is generally small, and not game play changing.
However, I can see multi-monitors becoming even more mainstream, simply because a lot of people who are not [H]ard, use it in work enviroments, and will be quick to pick up on it in any setting.