[fulafel]

You're technially right but conceptually he did show that the bitrate isn't in the normal 4k ballpark.

There's likely little or no benefit on using a 4k resolution at this bitrate.

In his experiment the Chroomecast on wifi gets a ~6 Mbps stream for 4k, which is about 20% of an average quality Handbrake encoded 4k stream. The surprise was that in his experiment Apple TV got so much higher bitrate. Market segmentation?

[wmf]

It's possible to capture the output and analyze the detail so I don't want to hear about what's "likely".