To imagine 30 years in the future, we need to go back to 30 years in the past.
Year 1990, it was the time when there was no internet(as we see today, the world wide web). At that time, if you needed to send a message to someone, you'd write a letter, that would reach the other person after days or weeks. If you needed to find a book, you'd go to library and go through hundreds of bookshelves and you might still not find it. If you needed t make an important decision in your life, you'd depend upon the person whoever was near to you not the one who knows the best about the subject.
The first website of world wide web was launched in 1991. And today the world has become smaller with instant video calls, online shopping, world's information just a google search away.
In next 30 years, the world is going to be common playground for everyone. The boundaries of countries would blur and concept of offices will be non-existent. People will be working with team members from different country just like they do now in one office, but from their own home or from the new place they decided to travel that month.