Really?
Ok, here's an iPad challenge for you.
Using only your iPad and no third party utilities like gotomypc or citrix receiver, log on to a corporate domain, check out a Word document from SharePoint, make some edits with tracked changes on, and check the document back into SharePoint.
This is what my users do all day.
A Windows 8 tablet can easily do this the same way my folks are used to on a Windows desktop.
I'm not saying that iPads don't have a place in the corporate world but you have to make adjustments to it and your network to get it even close to what a Windows 8 tablet can do out of the box.