Five hundred Google. Six hundred Google. Seven hundred Google.Are we going to see $1,000 Google ( GOOG)? Why not? After all, isn't the sky the limit? Sandeep Aggarwal, an analyst at Oppenheimer & Co., just raised his price target for the stock yesterday to $850. So I figure I'd go to four figures. And Wall Street always likes a big round number. Dow 10,000. Nasdaq 5,000, oil $100. Google hit a new record of $736 yesterday. It's been gaining an average of about $5 a day since it started taking off two months ago. By my calendar, it's on track to hit the big $1,000 in the last week in January. You want to take the over or the under? If everyone piles on, it could of course get there much sooner. A self-fulfilling prophecy. So what would $1,000 Google look like? That stock price would give this nine-year old company a market value of around $310 billion. That's still smaller than the likes of Exxon ( XOM), at $486 billion, and General Electric ( GE) at $412 billion. And it's still slightly behind Microsoft ( MSFT) at $344 billion. But at $1,000 a share, Google would be worth more than veteran drug giants Merck ( MRK) and Pfizer ( PFE) together. It would be worth twice as much as Apple ( AAPL). That's some baby. But the company's soaring stock market fortune raises one big question: What sort of long-term return can the shares offer from these levels?