There are all these things that add up into this business that's Walmart that keeps it really interesting. At the root of it all, though, it's a people business and it's a merchandising business. Today, it's increasingly a technology business. The supply chain is critical, of course, and real estate still plays a key role.

I think what we've seen happen so far is that as we've applied technology for the picking process in the store, for example, is that job composition has changed but we have about the same number of people.

So I care what people think, and I like people, and I like employing people and I like creating opportunity for people so I'm pro-people and I want the technology to help us serve people. Of course, we want machines to do what machines are best at, you must and you want to, and at the same time, we should consider the importance of being purpose-driven.

Looking ahead, we will compete with technology, but win with people. We will be people-led and tech-empowered.

Technology is nothing. What's important is that you have a faith in people, that they're basically good and smart, and if you give them tools, they'll do wonderful things with them.

I think the main thing that we need to do is just provide people choice, show them what data's being collected -- search history, location data. We're excited about incognito mode in Chrome, and doing that in more ways, just giving people more choice and more awareness of what's going on.