I’d never want to use a built-in physical keyboard on any device that has a touchscreen display, though some companies insist on coming up with such accessories. But the fact is that using touchscreens can be annoying in some instances where some sort of tactile feedback -- like the presence of a button -- might be helpful.
One startup figured out a way to manufacture a particular tablet case that creates buttons out of nothing (okay, it’s a liquid). More interesting, a German company is now studying a different kind of touchscreen manufacturing process that would let it add next-gen haptic feedback features to a display. Essentially, Robert Bosch wants to add a "feel" sense to displays that could be used without a person looking.
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