This is merely a point of perspective. You're saying the Apple don't target professionals with the iPad, I'm saying thats because they can't target them. But some people want a tablet that can also be a more serious computer when they need it to be. On a plane, they may well just want to kick back and read an ebook or something they bought on the Kindle store, or watch a movie etc. You don't need a keyboard for this and in the comfined space of a plane it's more convenient not to have one. But then when they touch down and are sat in the hotel checking and writing emails, they may also prefer to pull out a wireless keyboard & mouse and type an email more efficiently than using an onscreen touch keyboard.
The clever thing about Windows 8 is that it plays exactly to that (huge) market. Metro is for tablet usage. The more conventional Windows UI works well with a wireless keyboard and mouse. Best of both worlds.
Apple's core market with the iPad is the only one it can be, because of their constraints with not eating into laptop sales. It's a consumption device, and a good, well designed one at that.....I have one so I'm not disagreeing with that point. But in my view it's limited, and because of that weakness, there is a Microsoft shaped gap in the market.
