The battery power issue is a distraction in this topic. It appears it will be an option with this new Bluetooth based system, but is already an option with DCC, but it's a bit of a sideshow IMHO.
The whole quest for battery solutions has been very eloquently debunked in a very good post made on the Model Railroad Hobbyist forum a month or two back. Unless you really need battery power (e.g. Garden railways or some difficult application), direct communication (wireless) control systems are much better served by a simple pure DC or re-used DCC power supply and the employment of simple stay alive circuits.
Stacking up the pro's and con's, battery power has only a few pro's but comes with a long list of con's. The track power option is the opposite.
If I can find that post, I'll post a link. It provides a very compelling argument.