Mac Screen Rotate's goal is to bring a bit of iPad functionality to the MacBook Air by enabling you to hold the laptop on its side and have the screen rotate to a vertical orientation. While the site markets it as a way to "read" your MacBook Air like a real book, the result is cumbersome. MacBook Airs have just enough heft to where holding them in this position for any length of time is annoying.
Where a program such as Mac Screen Rotate comes in handy is if you're wanting to show off a vertical photo, graphic design or spreadsheet. It would come in handy for certain niches that work in these particular fields and gives you a bit more room to show off a document without having to compensate for the narrow horizontal screen.
Then there's also the fact tha
