By Jim Cramer, TheStreet

I don't care if Apple (AAPL) sells out the iPad at its own stores. I don't care if Best Buy (BBY) sells out the iPad, as we learned today.

I care if Glen Tullman buys the iPad, because if he does, then I know Apple will have created its biggest product ever.

Who is Glen Tullman? He is the chief executive of Allscripts-Misys Healthcare Solutions (MDRX), the leading maker of software to control costs for doctors and hospitals in the United States.

Tullman told me last night that his company just received its iPads yesterday and is building an app that will allow doctors to walk around with the iPad, clipboard-style, so that they can input prescriptions and data right into the records and right to the pharmacy. It's the first technological product that he says can replace current systems and save money for the company and that the company will most likely be switching to the device en masse.

This change is so important because, as everyone knows, Apple has really never cracked the corporate market -- hence, the "did they sell 500,000 or did they sell 300,000 or did they sell 453,000?" article I read about round numbers being wrong this weekend."

Who cares if they sold 300,000 when outfits like Allscripts-Misys might spur the buying of hundreds of thousands themselves? This is the real deal, the breaking out of the consumer ghetto by Apple and the liberation at the hands of the Dell (DELL) and Hewlett-Packard (HPQ) taskmasters.

Bing: More on Apple's iPad

I don't know why market prognosticators don't talk more about how Apple must crack the corporate market now to stay with a high multiple because otherwise it keeps selling into its core audience, and at some point, that runs out.

This is the device that will work for lawyers scribbling in court, for investment bankers noodling in their hotels and for doctors on their rounds. That's more important than the endless tallying by the endless retail stores.

So, when you are thinking of selling Apple for more than a trade, when you are thinking of abandoning it before my $300 target is reached, think of Tullman, think of Allscripts-Misys, think of corporate, and think how much bigger it will be. After all, a generation of kids brought up on Apple is now getting in charge of major portions of companies and they simply do not understand why they ever have to deal with Dell.

Do you?

At the time of publication, Cramer was long Apple.

Jim Cramer is co-founder and chairman of TheStreet. He contributes daily market commentary for TheStreet's sites and serves as an adviser to the company's CEO.

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