I don't. The target segment is people building rich, interactive video-game-like UI's, for things like mobile/embedded devices.

Though as an aside, I think voice control is very underutilized in modern GUI development...

Please don't. It sounds like you're recreating flash and we all know how annoying flash guis were.

Sounds like the guy is doing entertainment systems where a gamey UI is fine. You don't want your car entertainment system looking like bootstrap.