The gang over at NeoGAF is currently pouring through some Switch data that has supposedly leaked. The data gives a look at how the Unreal Engine 4 will work on Switch. The really interesting conversation coming from this data involves seeing how games operate when the Switch is in portable mode. It seems that the Switch will be downgrading a number of elements for when you're on the go, all in the name of keeping things running at an acceptable rate. From what I understand, imagine changing a PC game's quality settings from high to mid-range when going from docked to out of dock.
If you're up for it, you can see a much better breakdown of the info over at NeoGAF. Check out the thread here (thanks OperationGamer17!)