“Azure RemoteApp will be generally available on December 11, 2014. Existing preview customers’ subscriptions will automatically be transferred to a 30-day free trial at this date.
The service will be available as Pay-As-You-Go on Azure starting December 11, 2014. Customers will also be able to purchase Azure RemoteApp through a Volume Licensing/Azure Plan SKU starting February 1, 2015.”
The pricing model is also announced:
More info on billing check out: http://azure.microsoft.com/en-us/pricing/details/remoteapp/?WT.mc_id=Blog_EntMob_General_PCIT