Google provided very comprehensive online version of Google Docs which is quite feature rich and reliable. I'm thinking of a desktop version built on their API & RESTful services. Yet I'm in early stage of reasoning and doing analysis.
Inarguably it's good to improve skills, gain experience and create great tutorials for RESTful web services training/workshops. But what's beyond that? If you are given such a client, would you use it, instead of opening your browser?