It already happened to them multiple times that's why we are on HDMI 2.2 which can go up to:
7680 × 4320 @ 60FPS
HDMI 1.0 could only reach:
1920 x 1080 @ 60FPS
The only reason it still works is because they keep changing the specifications.
And I think I can confidently say we will never need more than 8K since we are reaching the physical limits of the human eye or at the very least it will never be considered low resolution.
Maybe, but I could see thunderbolt replacing HDMI and display port over time. It can carry video, audio, data, and power simultaneously, and has more bandwidth for additional information like HDR or 3D.
Na, when you go any higher in commercial use you just use multiple cables, HDMI 2.2 can only reach 10ft as it is if you lower the bandwidth it can go farther, I could see a optical video standard for commercial use though.