Reviewed goal in Pens game

Since the views from above are sometimes blocked by a glove/crossbar/body I wonder if they will ever be able to put a line of tiny camera's under the ice behind the goal line to see from below and not have those obstructions.

I realize that this is probably too expensive to implement and also the logistics are a nightmare as these are multi-use facilities and the ice is always brought down.

That just kicked another idea in my head that may work better logistically. Put tiny cameras on the inside of each post as close to the bottom as possible to see under the gloves and such and get angles that can't be had right now. You can put heavy plexiglass over the camera that can be replaced when needed after pucks/sticks/skates hit it but give you enough of a view to see if the puck is over the line?

I like to muse on these types of ideas. Your thoughts?