A photo app is a utility. It's like comparing 'Twitter' to Microsoft Word. If you want to be an author, you're not always going to constrain yourself to 140 characters.
In 2005, MTV Networks considered buying Facebook for seventy-five million dollars. Yahoo! and Microsoft soon offered much more. Zuckerberg turned them all down.
Microsoft's new OS, Windows 7, may finally be a worthy successor to XP, eliminating the clutter of Vista and letting users get to what they want to use without the fuss. All this, while remaining compatible with their IT departments' demands for scalability and custom implementations.
A lot of people think, and Microsoft is happy to let them think, that all great things are invented by Microsoft. In fact, very, very little has been invented by Microsoft.