A:AnswerIt has built in Wi-Fi and smart capabilities, but you can hook up external devices if you wish. I have Chromecasts on every one of my smart TVs.
A:AnswerNo, you'll need a Chromecast to plug in. There is no Google option. The Samsung Smartthings app will control it via Alexa, but it won't act as a hub as Samsung implies.
A:AnswerThe motion rate is the herz. 120 Hertz. This is the refresh rate that you see on fast action type shows. I think the 8 series type TVs start at 240 Hertz.