Tape your notes to the lid of the laptop and it's out of sight from even the most complete "scan" of a room. If people can cheat during an in person exam it's not possible to enforce cheating restrictions off-site, it's a completely useless loss of privacy to enforce an unenforceable idea.

I'm not pro-cheating, but this is just another example of tech trying to show that it can solve any social problem through even more technology and we already know this doesn't work. You must face the social issues head on, you can't just throw money at them in the form of more technology.