The Nokia E6 will receive the update later in the week and the Nokia 500 is getting it in a few weeks.
The most attractive feature of the Bell Refresh is the improved HTML5 support in the browser, but the new version also introduces new homescreen widgets and the Microsoft Office Mobile App. Those sporting a Nokia N8 will also get a suite of photo manipulation apps.
Do keep in mind, though, that the update might break compatibility with some applications. Unlocked phones, of course, will be the first to get the update, with carrier versions following later on.
source: Nokia via My Nokia Blog