It's not just researchers. Engineers at Google get to spin up products and throw spaghetti at walls, too. Google has more money than God to throw around.
Google's ad dominance will probably never go away unless antitrust action by the FTC/DOJ/EU force a breakup. So they'll continue to lead as long as they can subsidize and outspend everyone else. Their investments compound and give an almost unassailable moat into deep tech problems.
Google might win AI and robotics and transportation and media and search 2.0. They'll own everything.