If you have a native monetization system where the atomic unit of content is the ad unit, that scales down all the way to a small screen experience. That's why Twitter is performing so well on mobile.

Skyping with your spouse works well enough, but apparently it is hard to get the kids to hang out on Skype for long.

My venture investing career has three phases, all roughly 6-8 years long. The first, at Euclid, was software to Internet. The second, at Flatiron, was Internet to bubble. And the third, at USV, has been web 2 to mobile. I have always used a new firm to denote a new investment phase for me. Throw away the old. Start with the new.

Startups are rapidly changing systems. If you use an annual review cycle, you aren't getting feedback at the same pace that you need to adapt and change the business.

I get everything that satisfies my soul from bringing together objects that are in the world, manipulating them, working with spatial arrangements, and having things presented in the way I want to see them.

We need new medical approaches to preventing and/or curing disease. We need new scientific approaches to generating, storing, and being more efficient with energy. Maybe we need more space exploration. Maybe we need more undersea exploration.

I believe the mobile OS market will play out very similarly to Windows and Macintosh, with Android in the role of Windows. And so if you want to be in front of the largest number of users, you need to be on Android.