heavenlywild:Paul1977:billgates: As per reports keyboard provides 9 hours and tablet on it's own undocked provides 3 hours for Surface Book
Hmmm.... 3 hours undocked is not so great.
That is why I am leaning towards the SP4 instead.
Is there a real world need to undock it though? At first i thought what a cool idea but the more I think the less appealing undocking seems, lack of ports, battery life, external GPU if fitted. The only real benefit i can see is that it's a point of difference over a MBP, but it already has a major point in that it is natively Windows :P