Australian TV isn't broadcast in 4k by anyoneSpot on. The real issue here is the low quality resolution of Seven's supposed HD broadcast. Grand Finals must be available in 4K minimum. If Seven can't handle that, they should be forced to let Foxtel air it (with their ads).
4k is great, but 1080 is fine
Though if kayo had a 4k stream I would be using.
Anyway, 4k doesn't fix jumper clashes.