Skydrive is a sad joke that points out how many easy opportunities Microsoft has to leap frog Android and iCloud. They already have a huge cloud platform. They are have millions of Live users. They're finally integrating Live accounts as Windows accounts.
They refuse to add dropbox like functionality to SkyDrive to make it possible to just have a set of files synced between all Windows (8, specifically) and WP devices. I've been told and have read various different reasons, but none of them were good.
edit: Scrap this post, my information is embarrassingly outdated. Kudos to SkyDrive. Glad to see Microsoft utilizing their Live accounts.
edit: It appears I was simply misinformed or working with old information. I had been told at one point in time that Win8 would absolutely not receive dropbox functionality via SkyDrive. This article implies differently.
re: why did they drag their feet so long on integrating 'live' stuff into windows - there was this little outfit called the U.S. government that slapped them with a consent decree that prevented them doing stuff like this.....
Uh, they have a dropbox-like client coming out soon. Also, I far prefer their web interface to dropbox's. I see no reason to continue using dropbox once skydrive client comes out.
The beauty of Skydrive is, it's WebDAV. You can mount it in Windows, you can mount it in OSX, you can mount it in Linux. There isn't a native client yet, but it doesn't strictly need one to work at a basic level.
Actually, again to make up for my inaccurate post, I have to give them kudos. I believe they're rolling out an oAuth api for SkyDrive so someone could build a linux client.