I think you're speculating. What little evidence I know says that Google is worried about response time, and have strong economic justification to not let it go up. (For example,
http://www.nytimes.com/2012/03/01/technology/impatient-web-u... ).
Google's initial response time was "virtually instantaneous" by comparison with Altavista. But recall how it used to be an actual form, where you had to submit a query? That took time. Since then, there are features like suggestions and results-while-typing, which help reduce the overall search time.
BTW, when you say "next Google", remember that you can't decouple Google from its advertising-based revenue model. It might not be possible for a search company that uses an another funding model, like DuckDuckGo, to be "a Google" in terms of size and income.
Floating VR controls don't work so well. It's very tiring to keep your arms out in front of your face. I used to work in a VR project, and had the advantage of being a fencer, so I could keep my arm in front of me longer than my co-workers.
Personally, there's still a lot of space left for the "connects everyone" model. What's really missing, and is hard to do, is prioritize connections correctly. That depends very much on personal interests, relationships, and current mood - all of which are hard to determine algorithmically.
The idea in my vision would be to ask something like 'who knows something about writing Excel files?' - a low priority task - and get a response within a couple of hours when a friend who has the experience also has the time to discuss things with you. Or, 'is anyone else interested in going to the beach tomorrow?' and have it only go to those who you are actually interested in going to the beach with.
Basically, personal assistants that coordinate with each other "the right way". A very hard problem to solve. But then again, personal travel advisers were also once a common thing, and useful spam filters non-existent.