The entire desktop UI model developed by Xerox is getting very long in the tooth. The computer mouse, cursor, overlapping windows, context menus, cascading menus, etc. It's all going away.

Steve Jobs and the Mac popularized this computing model, and the iPad is now popularizing it's eventual successor, the natural user-interface via touchscreens, voice interface, the cloud, mobile devices, AI.

The iPhone and iPad absolutely represent the next computing era.