The dialog box highlights the salient features of Windows 10, including the redesigned Start Menu, Cortana integration, multitasking capabilities and enhanced security features. Microsoft's Edge browser, the new Windows Store also get a mention. You can also check if your PC is ready for Windows 10 through the dialog box.
To reserve your upgrade, all you have to do is enter your e-mail address. Once Windows 10 is available to install, Microsoft will send you a notification indicating the same.
How many of you have received the notification to upgrade to Windows 10?
Thanks everyone for the tips!