There are still plenty of cheap LCDs in the world, they just don't show up in high quality products. I bought a cheap Android tablet (a Viewsonic gTablet) a whi

There are still plenty of cheap LCDs in the world, they just don't show up in high quality products. I bought a cheap Android tablet (a Viewsonic gTablet) a while back to try out, and it had terrible viewing angles. The banking example on the site actually implies designing an ATM specifically to take advantage of this feature. There are often people around you when you use an ATM. Other products where security is an issue (special more-secure laptops?) could be designed this way as well. You wouldn't do banking with people watching, but if you needed the ability to do company work while, for example, spending a lot of time flying, it might be a net benefit.