IE10 will get it's very own MSN:

The launch of Windows 8 and Internet Explorer 10 will change the way we use devices and the internet. It opens up a new class of opportunities for us to reimagine all of our products and services including MSN. MSN with more than 480 million visitors per month is the top site in 27 markets and remains one of the most popular media destinations on the Internet.

When we saw what Windows 8 and IE 10 could make possible, we saw possibilities we had never before imagined. We thought deeply about how you could interact with MSN in an increasingly touch and tablet-friendly world. We envisioned something completely new and refreshing that would surprise and delight. Something built from the ground up that harnesses the new technical capabilities in Windows 8 and Internet Explorer 10.
Read the full blog:

The All New MSN for Windows 8