Channeling Paul Graham: "Microsoft is dead" != "Microsoft is going to be out of business tomorrow". Same with Google. Yes, that company will be around for 50 years, but what Google used to be is gone.
Honestly, I've worked both on Wall Street and at Google. Individual people at Google are nicer, but the careerism and mentality (among people who want to move up) are nearly identical.
GOOG profits are still growing, and they still control online search which I think will remain a huge cash cow for a long time.