You can buy a micro HDMI to HDMI cable for cheap.If its a sports camera I doubt it will have 8k (45mpixel). I bet its more like 30mpixel and 6k or something. Though I might be wrong. Since they managed to get 45mpixel with 20fps out of the R5, it may be very well possible for the R1...
Coming from the R5 I mostly hope for:
- a full size HDMI port
- 4k50 and 4k100 without overheat and with audio
- more physical buttons (especialy a mode dial, dedicated ISO button and WB button)
I think overheating can be avoided when Canon uses 5nm process on their DIGIC chips.