Not really anything to learn, other than a slightly different UI. Web-based or local-based, Office still looks and functions like Office. As for SkyDrive (or what ever they're going to call it next) can be treated as another drive. One great thing about Office 2013 is that it does just that. When you to save a file, SkyDrive is just another option.

>Thank you for your input. In my case the "everybody" is just me. And I am sure that Office365 has some benefits. But I am learning so much technical stuff now (for development) that, in case of Office, I prefer to use something I already know. Maybe in the future will try it though.