Mobile commerce, m-commerce, thumb shopping — 2010 was the year that consumers really began buying on smartphones and tablets. And it’s been predicted that within the next few years, we’ll spend as much as half of our time browsing the Web on our phones.

No group is more knowledgeable, or more optimistic about m-commerce than top retail CEOs, who view the new mobile trend as a crucial medium for expanding sales and changing marketing — not to mention the way we traditionally view and buy merchandise.

We’ve gathered the top lessons and opinions of ten industry heavyweights, from eBay’s John J. Donahoe to Amazon’s Jeff Bezos, on the future of mobile commerce. Click through the gallery below for their thoughts and predictions.