Pretty crazy you will soon be able to shoot full-frame 8K for $6-7k. Currently, the cheapest way to do that is the Monstro for $50k+. And the cheapest 8K is the Red Helium sensor at $25k (but actually closer to $35k to actually shoot something).
Seems as though the E2 is getting lots of great reviews and I actually like the idea of a modular brain (like Red) if you can get accessories that aren't $2-5k a pop. Snag a Shinobi monitor ($400) or Swit ($200) and some Sony NPF batteries ($100 for all-day power), and you're good to go.
The full-frame with EF Mount + something like the Sigma Art 24-70 or 24-105 would cover a ton of use cases. Definitely intrigued.
Oh I agree 8K frame grabs will become the norm down the road for Photography. I doubt there will even Be a Photo mode in cameras years from now. Just 8K bust mode or better.