How about AMP email?

And it is Google, a Web pioneer, who makes the first step towards a big email revolution since the late 90s. Google’s web framework AMP (Accelerated Mobile Pages) which was originally intended to speed up websites, now introduces enhanced capabilities for email as well. For example, AMP’ed emails now allow the implementation of changing text content, image carousels or even forms that can be filled out directly within the email client’s inbox. After text-based and HTML-based, emails are now AMP’ed. It is quite safe to say the year 2019 has good chances to one day be considered the year in which the email was reinvented.

Read more here: AMP