As a long time TabletPC user (long enough that I used the term 'TabletPC'), I avoid vendor drivers from past experience. In the past, the Nvidia and Intel graphics drivers I've installed have worked 95% of the time. Day to day use was fine and some apps performed better, but display rotation and external display setups would almost always be partially broken. For example, rotating the built-in display would rotate the image on an external monitor or projector, with no way to change the rotation independent of display.
I'm sure things have gotten significantly better, but I just can't risk running into unexpected issues like that when doing presentations or working out of town. So, 'installer beware': If you're going to be messing with GPU drivers, make sure to do a dry run on any external display presentations. (I have heard of the updated drivers causing issues with wireless displays, so maybe my fears are still founded. Not sure if it is the latest, latest, but a recent version.)