The touch screen is everything. It’s such a logical way of communicating with a computer - essentially its pointing at something and that something happens. Make a simple layout with large icons and text
Combine that with voice recognition, Speech-to-Text and Text-to-Speech and a computer has never been easier to use.
2. A simple Keyboard
We are used to a pop up keyboard but its a QWERTY layout keyboard. A legacy of a touch typing era where the letters are in the correct place for your fingers for fast typing. But that applies to full size keyboard and a touch typist. If you have not used a keyboard before there is no logic to it, we all know our alphabet. One simple change is to to make the keyboard simply A-Z with a line of numbers and the important special characters @,/ etc.