Does it make sense to have a touchscreen on every gadget?

The last few years have seen the rise of touchscreens in our most personal gadgets: smartphones and tablets. This technology seems particularly fit for the two mentioned types of electronics. Before smartphones had big touchscreens we had to deal with small screens and hardware keyboards that took a large area of the front of the phone. At first I didn’t believe replacing a good tactile keyboard is going to be worth it in screen real estate, but look at RIM now and its Blackberry phone layout and you’ll see why I was very wrong. Tablets in their new slate form [...]