Gates' prediction: "'Personal companions' will be developed. They will connect and sync all your devices in a smart way, whether they are at home or in the office, and allow them to exchange data. The device will check your email or notifications, and present the information that you need. When you go to the store, you can tell it what recipes you want to prepare, and it will generate a list of ingredients that you need to pick up. It will inform all the devices that you use of your purchases and schedule, allowing them to automatically adjust to what you're doing."

What we see now: Google Now, a smart assistant that runs on mobile devices, is starting to head in this direction. Meanwhile, smart devices like Nest collect data on your daily routines and automatically adjust your house's temperature.

There's also a wave of voice-controlled devices, like Amazon's Echo and the Google Home, that you can ask to read your email to you or guide you through recipes as you cook.