If you have worked with Performance Point Server before this change in strategy is not all that surprising. The product is ( at least the Monitoring and Analytics) is very focused on delivering items via SharePoint. In moving Performance Point Monitoring and Analytics into the SharePoint stack, this functionality is now available to all SharePoint Enterprise customers. And for free assuming you are licensed for SharePoint Enterprise.
Going forward the functionality will be further integrated into the Office stack increasing the inroads of these BI technologies into a large number of users within the enterprise. Here is another post from Russell Christopher on some of the benefits of this announcement.
In my opinion this is a great strategic move by Microsoft to promote these BI technologies in the Enterprise.
