I got the same e-mail yesterday...
Last time, they stopped OE access for NEW FREE accounts, but existing accounts were "grandfathered" and continued to have access.
I heard about a few people with old accounts who eventually lost access, but my account still has access....
Now, it looks like they're cutting it off altogether.
There are plenty of e-mail providers, I'll probably just abandon the Hotmail account.....
or use it for online "offers" (that often result in spam).