Does Microsoft send you the same message? (details inside)

I’m using Windows 8.1. One day I saw a Windows icon under the lower right corner of my desktop screen. I clicked on it and saw an advertisement for Windows 10. It introduced everything that was supposed to be in Windows 10, and it asked me it I wanted to reserve my copy of Windows 10. It guaranteed that the copy would be a full free version. I only needed to enter my email address to reverse a copy.

Does it sound too good to be true? Is it a scam? Did any of you receive something like that on your computers?