If you do not have a use case or application need for 3D there is nothing to gain by enabling it. If video playback is of greater importance than 3D applications. I recommend not turning on 3D and sticking with a 2D based desktop for greater consolidation and better HSR video playback. If you have a need for a little bit of both and the 3D need is basic ( Aero / Office ) Soft3D is the sweet spot.
WP