I dunno. I like Sundar. I like his straightforward style. Personally I think he's got it together a lot more than Larry and Sergey do. When Larry was the boss, I always felt like we were lurching. Sundar feels like high speed cruise.
Look this ship don't turn fast no matter who's at the helm. And it's not even clear it needs to. Maybe it's already sailing where Sundar wants it to (mad money + compelling products). As far as I can tell, public sentiment about Google is very different from tech/nerd sentiment about the same, and that's fine by me, because the public seems to like the company and its products. We are making money hand over fist with no end in sight. While our politics might not be progressive enough for the left fringe of Googlers (and I say this as a liberal myself), they are certainly not reactionary by any stretch.
I wouldn't expect a radical new idea to spring out of Google at any point in the future. It's too big for that. The folks with radical new ideas are working in their garages. And that's OK. Companies have life-cycles, like anything else, and Google-the-company is in the "mature adult" phase. It is refining and extending in the areas where it's strong. Occasionally it tries a new hobby, but it doesn't expect to make a career change. It can't. It likes its day job (the best damn information-seeking web properties on the planet), and even if it got pretty good at something else, it's hard to picture a scenario where the productivity of that alternative comes close to the main business.
I guess this is the long way of saying that I don't see why the investors would want Sundar out. I don't see why Larry or Sergey would. And I don't see why most employees would either. We're all getting rich and mostly being treated well, and building things that broadly speaking make the world a better and more productive place. Those are all the people that get a vote, so I wouldn't bet on Sundar going anywhere soon unless he wants to.