Hi All,
I am in the fortunate position to have an iPad pro, Macbook & MacBook Pro 15" and a surface pro 3 as of yesterday.
The way Apple makes their devices I feel is for specific use and I have concluded for my use a laptop and iPad are the ultimate combination. I can see how the iPad pro will suffice for a lot of users with basic internet use, email and word processing but for a design professional as myself it cannot replace the laptop at present.
Hence I feel the combination for me [hoping anyway] is the iPad pro and the redesigned 13" MBP [of 14 is better]. This allows for all uses, extra power when required in a still portable manner [plus can hook up to my monitor when needed].
Using the Surface Pro 3 [yes I know the 4 is better - but not by a huge amount], allowed me to conclude as many others have that it is a compromised piece of technology - not as good a laptop as the MB and not as good tablet as the iPad.
Of course all of this is expensive, having the 2 devices, however if the money is fine then my personal advice would be to get the MBP and iPad pro for my professional design uses [CAD,Rhino, adobe suite, sketching, evernote, internet, outlook mainly]. IF CAD & adobe were taken out the list then the iPad pro would certainly suffice. It is a fantastic piece of technology and the pencil is my dream device. It just needs to go that extra distance which may be a while away for my requirements, but for most I can see it being the replacement device Tim Cook alluded to.