I'm looking for a new GPU at the moment and the existence of Shadowplay has pretty much decided for me that I'll buy an Nvidia card. I need to do work with videogame footage very often, and I don't really want to use a capture card for it. (That and it'd still not record 1080p @ 60 FPS unless it's high-end)
What I hope that gets tweaked a lot in the beta is those options tho. Is there really no configurable parameters? The ease of use is nice, but selecting bitrates manually and resolutions should be priority. I doubt the lack of these choices are related to hardware, right?
I'm certain we'll see constant improvements and features. This is basically a baby-step release with the basic features. They even showed off ShadowPlay with Twitch integreation, webcam integration and I also believe it had external microphone integration. However that's not in this version. I see no reason to not allow custom resolutions, even if it's below 1080p, aspect ratio selection / appropriate res or perhaps multiple audio sources.
There is a lot of room for improvement.