Let's face it, Linux should not try to win the battle for the desktop. Not only it is already lost, its is pretty much irrelevant. I feel that instead of producing another fork of desktop office package, efforts of open source contributors would be much better spent on creating Open Source counterpart of Google Apps.
I do a lot of things with my linux-based NAS already: it is backup server, git server, hub for online and offsite backup, media storage, and much more. But I wish more apps would be easily available for an easy installation, without fiddling with database settings and ruby versions. I want my own pinboard.in, I want my own RSS reader, I want my own mint.com installable on my NAS with few clicks. I would definitely pay for good commercial apps too! I just want them to run on my server with the data I control.