Agreed! I am concerned though that even if a viable casting alternative started gaining momentum that Google would essentially prevent it from being widely adopted or incorporated into apps/websites the way that Chromecast is. I think it would have to be created by a large tech or media company and/or be compatible with Chromecast.
Apps are still really frustrating though. If an app exists (big if), I found the apps to either miss key features compared to the corresponding apps on other platforms or the UI/UX was terrible for a TV app.
I could get by if just one of casting or the apps were comparable to more popular alternatives. Having neither makes it very difficult to moved away from those alternatives.