I agree. If search ever becomes less important (e.g. voice stuff like Siri takes over), then Google will struggle. Google management is intensely aware of that

I agree. If search ever becomes less important (e.g. voice stuff like Siri takes over), then Google will struggle. Google management is intensely aware of that, which is why they're investing so heavily in voice search, wearables, etc. It's not to mainly grow their market, but rather to keep from being stuck in a shrinking one. Apple is also intensely aware of Google's vulnerability, which is why they're developing things like Siri and maybe even wearables.