Could people who have it working SMOOTHLY (to me not smoothly = not working) at 1080p please post the wifi setup they are using? (Router/AP model and 2.4 or 5ghz, is it in the same room, other devices connected, port forwarding or QoS or other router config, or anything else noteworthy)
I haven't touched my chromecast in 3 months because it basically didn't work for anything I wanted to do (main thing is playing photos/videos shot with camera on a bigger screen). Back then I was using a wired router and a Asus EAN66 as wifi AP (box-claim speed of 450 mbps) sitting within 10 feet of both phone and TV/Chromecast in the same room but it was horrible - I was lucky to get maybe 20 seconds of smooth video max. Then it would crash. Much faster to transfer files to computer via usb3 or sdcard then play on TV. Similar story on a Linksys E1000 but I forget which was worse.
True smooth 1080p screen mirroring... that would be nice. Truly something that would wow people. I now have Netgear R7000 (model name "Overkill") and it's 5 feet from the TV so it really better work now! I'll report tomorrow when I can mess with it.