I have my laptop strapped to my bike in a Chrome messenger bag so I'm going to need to have the water attached to the bike.
Geeks.
A laptop may fit in some Camelback versions. Alternatively, the bladder may fit in many other backpacks that would also hold your laptop. Being able to drink hands free is definitively superior to reaching for the bottle 30 times. If it were me I think I'd find a way to carry the 3L camelback bladder with the laptop all on my back.