I suppose Microsoft didn't intend for me to laugh every time the login screen comes up on Windows 7. It's just that it reminds me of the splash screen to Flower, for Sony's PlayStation3.
(No, I'm not saying that Microsoft modeled their login screen from Flower. Windows 7 and Flower came out within months of each other, so they were definitely in development at the same time. I just find the coincidence a bit humorous. Laugh.)