I just visited google.com using Internet Explorer 10 in Windows 8.
Because I was signed into my Google account, my Google profile appeared in the upper right corner, along with a notification that there was something new for me to look at. Here’s what I saw when I clicked that notification:

Update to a modern browser… Hmmm, what could they possibly mean?
By the way, if you use the F12 Developer Tools to change the user-agent string to Google Chrome, the page displays just fine. Cheap shot, Google.
In a related development, WordPress is also getting confused by Internet Explorer 10. I have an up-to-date, self-hosted installation of WordPress. When I visit the Dashboard, here’s what I see:

Thankfully, the Browse Happy website isn’t shilling for any browser maker. It’s just designed to educate people who might be a revision or three behind.
Still, WordPress, you might want to fix that.