Absolutely. As long as a TV has an HDMI port, you can use a Roku device with it.
When you setup and activate your new Roku device, just use the same email address as you did with your RokuTV and all your subscriptions and channels/app you had on your RokuTV will carry over to the new device. (The email address used during setup of a Roku device/RokuTV is your Roku Account).
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102