Skype has a great engineering team, which I like to describe as 'all of Estonia.'

Innovation accelerates and compounds. Each point in front of you is bigger than anything that ever happened.

Over the next 10 years, I expect many more industries to be disrupted by software, with new world-beating Silicon Valley companies doing the disruption in more cases than not.

The multipurpose device will always fail.

Once you understand that everybody's going to get connected, a lot of things follow from that. If everybody gets the Internet, they end up with a browser, so they look at web pages - but they can also leave comments, create web pages. They can even host their own server! So not only is everybody consuming, they can also produce.

TV and the press have always functioned according to the same sets of rules and technical standards. But the Internet is based on software. And anybody can write a new piece of software on the Internet that years later a billion people are using.

No one should expect building a new high-growth, software-powered company in an established industry to be easy. It's brutally difficult.