Now the microblogging service is finally rolling out the redesign to all users. On December 12, everyone will be able to update their Twitter profiles to include a large header image across the top of the page with a smaller profile image in the center (see image above).
And no, users really don't have a choice about it -- unless they want their profile pages to look slightly off. In its blog post announcing the redesign, the company is encouraging users to upload a header image within the next couple of days so that they don't end up with a "default grey image on your page. That's not fun!"
Here's a look at a video from Twitter explaining the changes: