The intention was to stimulate discussions on startups that could challenge all 3, even if individually, in one topic; not necessarily one startup that challeng

The intention was to stimulate discussions on startups that could challenge all 3, even if individually, in one topic; not necessarily one startup that challenges all 3. I've revised the title to a plurality. But I don't see why there couldn't be a search, social, and shopping startup. Success is not necessarily taking dominant market share.