That's the word coming from industry analysts just days after Page became the CEO of . With to become the online powerhouse's executive chairman, Page, a co-founder, is back in the big chair.

And everyone is expecting some significant changes.

"It's very reasonable that Larry is going to sit down and he's going to reorganize the company," said Colin Gillis, an analyst at BGC Financial, a New York-based investment firm. "Larry is taking over, and he's likely to make some broad changes and he's likely to do it relatively quickly."

Actually, those changes came immediately.

Page officially took over as CEO on Monday -- the very day that Jonathan Rosenberg, Google's product chief, . By all accounts a highly crucial cog in the Google machine, Rosenberg is expected to exit the company in the coming months. At this point, it's unclear who will replace him, or if he will be replaced at all.