Being a windows phone and Laptop user I'm going to have to say I love the cloud named Onedrive.

Microsoft has a good direction. They don't want to focus on a single physical device but instead unify everything flawlessly. Also apps are becoming universal, one app on all your devices working in unison. I love using Microsoft Office on the cloud with my phone and laptop. I never lose an inspired thought.

I have a tiny laptop about 13 or 14 inches. It is so thin that it doesn't have a built in. I can always get a external one if I need it.