You hit the nail on the head
Your statement " I carry the mac and remote into my Win7 desktop whenever I need something Windows specific" is why Apple hasn't made significant inroads to enterprise IT environments. If you need to have a PC on hand to access your companies applications using your Macbook Pro, then why would the company buy you a Macbook Pro, rather than a Windows based laptop? Until all of the major players in the enterprise application space change course and develop software that will run natively in OSX, which is not likely going to happen any time soon, then Macbooks will be relegated to the design and graphics departments, where they do an excellent job.
At the end of the day it really isn't about the cost/performance benefit of a Macbook, because that agrument doesn't hold water, it's more about form factor and personal preference.
