Hi @oldprog,
Thank you for posting here in the Roku Community!
We will be delighted to assist you further with this inquiry. Since you plan to purchase a 4K TV, you can consider our 4K streaming devices. You can check out our Roku website for our list of Roku streaming devices to see what best fits your needs.
If you need anything else, please let us know.
Best regards,
John
John
Roku Community Moderator