I am a MS Windows fan - the worst piece of software that I have to use regularly is iTunes and whilst my iPhone 4 is great it is no use for doing anything business related.

I'd see this in the same way. At the moment airport lounges are full of people travelling on business with a laptop and an iPad. They'll get out the laptop to do their work on and then use the iPad to watch a movie once they have finished working.

A decent MS tablet would cover both of these things - I can watch movies and play great games on my Windows device, I couldn't update a spreadsheet, document, plan, code etc. on an iPad.