I have both a Macbook Pro 15 and an iPad Pro, I'm going to put up a review of the Apple Pencil later tonight because I think the iPad Pro is more of a no brainer. I.e. if you have very light requirements from a laptop like email, web and basic office, it'll work, if not, it's not really a laptop replacement. If you need a big screen consumption device, you probably don't need a review to tell you to buy the iPad.
The real value of the iPad Pro comes from the Pencil for art, note taking or photography, so it's more the arty side, but I don't think the business (corporate) take on for the iPad Pro will be big. It may be more suited to some mobility tasks used in industry (plant maintenance) where the extra screen size is an advantage, but not in corporate suit and tie environments.
I actually think my mum could probably get away with using it because she only does email, Facebook, web, basic word and photos
I'm disappointed with the apple keyboard, its worse than the SP3 and SP4 keyboard, provides less functionality, is more expensive, has a bad floppy design, and what it does do on the keyboard side, it does worse than the SP3 and SP4 keyboards