Is it only me, or is Windows 8.1 still lagging way behind in implementing core features of a desktop computer? The SkyDrive App is finally usable to browse on local hard drive, however... the standard file selector page (for eg. when picking attachments) in the Mail App already has support for selecting files over the network. Why on Earth has this feature not made it into the SkyDrive App? Plus, why does the SkyDrive App have a video player of it's own? The only feature that could justify this is if it would support streaming of videos that are not always available offline. However, if Skydrive is really integrated into the system itself, I'd take it that this feature should transparently be available to all files accessed by any player (or any file actually).
Sorting files using the only stock file browser (SkyDrive App) is really far from being ergonomic. If at least one could open multiple instances of the app (similar as to how the Mail App is capable of opening a particaular mail in a seperate window) and then one could copy between these instances (even more than 2 if one wishes) would greately increase it's usability.
These features either call out for SkyDrive to change it's name to File Explorer (or something similar), or just releasing a seperate app that can be used as a full featured browser.