My next TV purchase will be a 120hz refresh rate 4k TV, and I currently have the Roku Ultra players hooked up to all my TVs.
Buy looking at the Roku Hardware specifications page, none of Roku players or TVs support true 120hz refresh rate. Some TCL Roku TVs may support 120hz CMI refresh rate but that is still 60Hz enhance (not a true 120hz refresh rate).
I hope Roku has on their roadmap a new player that supports HD/120Hz and 4k/120hz true refresh rate otherwise once I upgrade my TVs I may stop using the Roku players if this is not supported.
I will think that the Players will need to have a hardware upgrade so the HDMI ports support true 120Hz.