In the long run, the business world gets to decide for us. As much as I feel I'm doing my students a service by having them collaborate in Google Docs, being " Office Certified" is still much more of a job guarantee. In the meantime, I'll vote a qualified Google Docs.
Because I teach computer applications courses using MS Office software, SkyDrive won't work as it doesn't have all the tabs needed for beginning software assignments. I use Google Docs for my computer apps capstone class for collaboration work.
On the surface Skydrive looks more intuitive in most areas (though it kills me to admit it, I've got family that works for Google). Both platforms will probably adapt to each other as people voice preferences about specific elements.
I prefer the ease of Google Docs, although I like the easy transition from Word on my desktop to Word in Office365. Students I work with these days are pretty versatile and able to adapt to whatever platform I put in front of them.
At least where I am Google wins. Sky-drive won't even get a look. We've turned into a Google apps shop. Chrome for a browser, mail domain via Google, Google apps everywhere and chrome books about to flood the school.
I agree with Sparrowhawk, that the industry will be the ultimate decider. My district is moving away from Google this year and to Skydrive. We have too many conflicts with Google email as well as working between Google Docs and Office applications. Hopefully, there will always be a place for both. Microsoft will ultimately win out because industry wants integrated apps as much as possible.
In my current work situation I think the first company to advertise server locations in W.A. will be the tool of choice for my department of education. For personal use - I don't really have a preference as I already use iCloud for my own documents. I have used Google docs a few times but never used Skydrive before now. I think my iPad has driven my consumer choice so far. As my institution's bandwidth is in the process of being upgraded we will probably see more sharing and collaboration in the future so will need to look at this as a school.
I think that those currently using google docs will stay there. It is convenient to stay there and there is a lot of support for google docs. However, Those heavily invested in microsoft will likely move to skydrive. I can see a strong play for microsoft with the xbox one and surface tablets to push for skydrive adoption.
For me there is a place for both and icloud.com. I'm just glad there is choice. Now if they would only play nice together.
"So many worlds, so much to do, so little done, such things to be." - Alfred Lord Tennyson