Are you listening, Ballmer? Why can't your Windows mobes do this?
And here's an action that I couldn't perform on Windows Phone OS: flagging a message accessed via IMAP. It's pretty basic:
Flagging a message: Microsoft, please note some of us find this useful
As with Windows Phone, a contacts card pulls in information related to the person, such as looking for photo albums. BB10 also looks for related info but it's more focussed on business:
Context information pulled in for a contact