I agree about the multi-user option needed but doubtful that the majority needs multitasking. I would argue if it's just a few techies that would truly use it.
For me true multi tasking is having two or more screens up at the same time. On my laptop/desktop, I do this often. Two documents to compare, two spreadsheets (not something microsoft know how to do), a website and a document so I can cut and paste. A document and a spreadsheet so I can write about the result of the spreadsheet.
No this is not a techie thing, this is a real world use case that applies to business and school, and just about anywhere where work is being done. The only use case where this is not needed is if the iPad is strictly an emailing/web browsing/ereading/gaming platform, where you truly don't do those at the same time.