When designing interfaces for the future it is important to not take the shortcuts to make a fast and cheap solution. It could be very tempting, but it is much more difficult to fix the solution afterwards than to make it right from the beginning. The technology is getting more and more advanced and that makes it even more important (and difficult) to make a good interface. A good interface is where you take away the unnecessary information and let the computer take more and more decisions on its own.
As I mentioned earlier the computers are going to have more and more control over our devices, that is why it is very important to teach the computers to do it the right way. Make complicated decision that seem natural for the user and not the opposite. Be able to customize the settings to adapt to the right need and impairments will be very important just as important as having adapted the interaction to different cultures.
I think it is more important to design for as many as possible instead of designing for just one purpose. In that way tools and solutions get cheaper and is more motivating for companies. It is hard to say how the future is going to look like, maybe robots will be the next personal assistant, but it is easy to forget that the most important thing for humans is being social and socially accepted. We cannot forget about what the needs are before finding solutions.
Non-excluding Design 