It’s all change for Power BI and its licensing. Changes are announced for a new Power BI which has a new user experience and new features. It’s currently in preview with no confirmation of General Availability yet, and you can read all about what’s new here: http://bit.ly/168mYfa.
Licensing wise, today there’s a Power BI Add-on for E3/E4 and a standalone Power BI licence, and a new Power BI Pro licence will replace both of these options. Pricing will be $9.99 per user/month and there will be a free version too (Power BI) which will, of course, have a lighter set of features. This link has a table of the features: http://bit.ly/1tPRiGA.
In the interim, pricing is reduced for the two existing plans from 9th February 2015 with the Add-on down from $20 to $9.99 and the standalone plan down from $40 to $17.99, all detailed on this page: http://bit.ly/1yZGotv.
And what about existing customers? From a features perspective, all customers will transition to the new user experience as soon as it’s available. In terms of the licensing, customers who licensed Power BI through MOSP will apparently receive a message through their admin console explaining how their account will be impacted with the lower price. For EA customers, they will transition to the new SKU and new price at anniversary. These details are all at this page: http://bit.ly/16fXTQh.