This obviously has negative repercussions. Many an argument between Janelle and me has started because I was given vital information while playing a game, vital information that I, of course, have no memory of. It can also push one's bladder to near bursting, or even make one unaware that a dog has decided to pee on one's leg.
However, there are some benefits. The biggest one, and the one most on my mind at the moment, is that it can help me ignore pain or discomfort. I've read a few articles that have talked about hospitals that use video games for this specific purpose. In my experience, the main problem is coming out of the trance to find that the pain is still there.