It's a brilliant idea, but I'm a bit of a dinosaur when it comes to things like this... my first inclination would be to think, "Yikes! What's up with my monitor?!"
I find it difficult to adjust to.
Just be a nutter... life becomes much more exciting, and people won't expect anything more of you...
It does it automatically, it's great Sometimes it needs to be disabled if you want to watch vids or pics that are low lit but I find it really good, it's definitely suprised me.