Roku / DLNA / Dolby Digital / Storage Subscriptions

Beyond the current Airplay and Chromecast… support for Roku, XBOX. Playstation, DLNA TV’s would be perfect (such as AllCast)

Subscribing to Dropbox / Google Drive / Box would also be great.

When I cast from Twonky to my Roku… it will cast the Dolby Digital Audio… would this be possible?