I noticed the same thing with the app - you can use it to perform voice commands (e.g., play, pause, skip, etc.) or to search. Nowhere in any of the links you posted does it say the app can be used to give letter by letter entry into an onscreen keyboard. The whole point of using your voice with the remote is so that you don't have to use the arrows on the remote to pick out one letter at a time. The app has a full keyboard, so it's arguably easier to use that than to speak one letter at a time. If this whole exercise is to see whether the dynamic keyboard works with a Voice Remote I can assure you that it does.