@DanHulme "That would go a little beyond the scope of this site. Though we try our best to help our fellows, we do not intend to be a all-inclusive technical documentation site, nor we are a "laymen's translation service" :)"
OK, never mind: "air gestures" seems to be close enough. I just remembered there were a couple of apps on Play imitating this (you know, for that "VTC question which is on-topic"). Using "air gestures" as search term indeed brought them up. Made that an answer ;)
I ordered mine today, mostly because my 10" Android Thinkpad Tablet won't boot any more and I used it mostly for watching movies because of it's HDMI output, so I thought a chromecast would be a cheap alternative