pads and tabs -- these tiny little devices that all connect, and there are a few different screens that we interact with. And he thought these issues would come about sooner than they did -- it was around the 2010s, instead of the 1970s. I don't think technology evolves as quickly as people think it does. There's a lot of persistent architecture in the way. For instance, the big issue with the computer mouse when Doug Engelbart invented it is that he thought, "Well, this is a temporary solution to a human interface input problem." Yet the mouse was around for 40 or 50 years before it finally, slowly got replaced by the multi-touch screen, or any of the other trackpad input devices. So it's a big issue that we have these ways of inputting data -- we're accustomed to the ways we use computers. And there are still going to be people who use regular desktop computers, and a bunch of people that won't migrate over to heads-up displays no matter how sexy and cool they are -- they'll still be out of the price range for people. And I wonder about privacy issues, theft, people throwing rocks at people -- there are going to be a lot of issues that occur when these devices show up in reality because it's the final marriage of your eyes to a camera that you can actually take pictures with, and send to an external place. But it's no different than having