Bag for city travelling (=tourist photography)?

http://goincase.com/products/detail/dslr-sling-pack-cl58058

Incase DSLR Sling Pack
Fits my 77, 35/1.8, 10-20/4-5.6, SP90/2.8, F43
Cleaning kit (Blower, 2 lenspens, Cloth)
Demb Flip-it Kit
2x Batteries
1 Body Cap, 1 Rear Cap
With lots of room to spare

Has a zip compartment for tablets or a 11' macbook air