Britannia have this arrangement.
As well as all reference material being available on the laptop, they also have a take-off performance calculator, which (we are told) in itself has an overall cost benefit in terms of power reduction and take-off capability, versus the cost of the hardware.
Personally I am very sceptical about the whole thing. Mr Gates will become richer as the airline becomes more IT dependent, and is forced to spend more on IT support and upgrades.