Google’s latest streaming device, the $30 Chromecast with Google TV HD, isn’t intended for home theater enthusiasts that live and breathe 4K and Dolby Atmos. Quite the opposite. The device is limited to a max resolution of 1080p (Full HD) and lacks Dolby’s best video and audio tricks altogether. It is at least capable of playing HDR video. But the target customer is clear: this product is meant for people who want to bring new smarts to an old TV (or monitor). Maybe you’ve got an…