Netscape was a company during a time when using the Internet was a niche activity.
Google is one of the most powerful entities in the history of mankind, with read/write access to the private information of the majority of humans alive.
The two aren't comparable. Indeed, there are few entities that are comparable to Google. Google won't use their technological edge to keep potential competitors out, they'll use their financial, social, and political power.
I don’t think they will. And I think like lotus notes running groupware, like windows running the desktop, like novell running the lan, Google will always rule search, and never make the transition into the next thing.
The company hasn’t released the significant product in 15 years, despite the huge amount of money they have this will be not be enough to change the culture.