Everyone knows you need an axe for hacking

from here and here (image source)

It's important not to let your need to do something override your aim to do an appropriate thing. Otherwise you're going to get an expensive lesson.

Maybe they should have tried camouflage instead

found on eBaum's World

Unless the button positions are randomized, an attacker wouldn't need to be able to read the screen, they can tell what buttons your pressing just by your finger positions. It would be cheaper and more effective to just erect a barrier on either side of the bank patron so that an attacker can't get into a position where they can read from the side.

When it comes to protecting your data, this won't cut it

from here and here (image source)

While there is room for both physical security and logical security when protecting your data, this isn't how it's accomplished. If anything, this is going to make it harder to stop a remote attack because you'll no longer be able to see what's going on or effectively issue commands to thwart the attack. It won't do much against a physical attack either because they can just take the hard drive. 

How To Make a Private Computer Screen

Watch on YouTube

In case the laptop privacy sweater is a little too uncomfortable for you when protecting your computing privacy in public, here's another (somewhat destructive) option. I think this is a pretty cool idea so long it doesn't become mainstream - then everyone will have the polarizing glasses and your privacy is gone again. It might also raise some awkward questions when you're going through airport security and they order you to power on your laptop to prove it works.