Intel has just announced that ultrabooks using its just-announced 4th-generation Core processors will have to support touch input and WiDi wireless display technology. The move means that, soon, all ultrabooks will be required to include touchscreens.

Intel made its opinion on the importance of touch clear last year when it demoed a touchscreen ultrabook prototype, so the decision doesn't come as a huge surprise. Microsoft has put Windows through a big transformation to make it more touch-friendly, and Intel's new requirements show that both companies are working synchronously.