I have an old school Roku but streaming like you can on Kodi is not happening. Used to use this channel that needed you to run an app on your computer to stream like you can on Kodi, don't remember the name.

Replaced the Roku with a Nexus player in the living room a while back. Definintely enjoy it more than the Roku, especially because of Kodi. Use it to play emulators too.

I am eyeing the Shield TV since you can use Amazon Prime Kodi and play emulators on it. Curious about games designed for it too. The cost has been too much to go for it though.

Unless there is a way to use something like Kodi directly with Roku I would go with an Android TV model (fire, shield or whoever else is selling them).

If you are doing everything legit then Roku will be a good option.