[trendia]

8k has four times as many pixels as 4k, so at the same bitrate/pixel it would be around 48mbit/sec

[jrobn]

You don’t need 4 times the bitrate because compression technology scales better than linear the higher the resolution.

[Wowfunhappy]

Furthermore, the 12mbit/stat is for content that has been encoded in advance, ie nowhere close to real time. If they want to broadcast live sports in 8k, they're not going to get such good compression.