I'm using a Roku Ultra connected via ethernet to a Netgear Nighthawk router with Gigabyte service by my ISP. I see these speeds on other device on the same network with other devices. Why wont my Roku device show nothing beyond what looks like Gig service, What I see seems to max out at what would be expected of a wireless connection.
Is that what this Roku device can do? What about buffering capability, is that similarly impaired?
Roku's are designed for Internet streaming. They don't need much more than 25-30M, even for 4K. The speed test built into them typically won't show much more than that. Although streaming local video could require higher speeds, that is a rather tiny fraction of Roku users.