Split screen video camera

Wouldn't it be good to have split screen home videos showing footage of a particular event from more than one angle? Wouldn't it be good to have split screen home videos without having to do all the video editing to align the multiple recordings? Would it be possible to have a video camera that saves aligned video from more than one camera simultaneously, where the cameras are connected by wires or wireless connection? Wouldn't it be good when viewing back to be able to dynamically choose how the different images are displayed (e.g. one main with two subsidiary, four equal sized elements, etc), for example being able to click on a video and make it the main one?