For the end-user this means that their incoming e-mails will be fully interactive and increasingly up-to-date with information that you want to see in your inbox.
If developers send an e-mail with Hotmail’s new changes, you’ll be able to interact with it and take actions within the e-mail itself. Basically, the new Hotmail e-mails will look, feel and behave like a web page.
This cool blingy update has potential to keep Hotmail competitive with Google’s Gmail. Going head to head with Google’s GMail is a tough thing, even when GMail has a slight upper hand, enabling previews from Flickr and YouTube within e-mails.
Check out this demo from Microsoft:
The pioneering companies to utilize this new technology will be Orbitz and Monster.com , with LinkedIn and Netflix coming soon.