What is it you imagine you can do on a 10" netbook laptop that you can't do on a tablet paired with an external bluetooth keyboard?
Anything that requires multiple windows on screen at once. One example is using a calculator that doesn't fill the screen. Another example is putting a source code window on one half of the screen and the output window on the other half.
Or applications that Apple has not approved. One of them is programming for a class or a hobby. Last time I checked, programming on iOS was limited to a small selection of interpreters for dynamically typed scripting languages such as Codea (a Lua interpreter) and Pythonista (a Python interpreter). On a netbook, on the other hand, if I want to use C++, Java, Fortran, 6502 assembly language, or any other language, usable tools are a sudo apt-get install away.
(For the purposes of this post, I'm treating the ASUS Transformer Book, Surface Pro 3, and other Windows x86 tablets as laptops. My objection is not to the tablet form factor but to the restrictions inherent in iOS.)