According to an article written by ZD Net, Microsoft is currently developing a cloud streaming service. No details have been provided however this would be a big step for Microsoft since Sony has also introduced this type of service in the form of Playstation Now, a service which allows gamers to play an array of titles from the Playstation library.
Microsoft has previously alluded to this type of service for XBox One and PC via the cloud and has previously described other types of uses for the cloud such as moving processing power in order to maximize future titles.
More on this as it becomes available.