Gpa-15 Loc: Tinton Falls, NJ

Topic Title: ...So as to produce the ‘precise’ still required.
(( as an addition to the Question asked in Re-1: below ))
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Re-1: How can cameras be improved in the future?
LINK:
<http://www.uglyhedgehog.com/t-490661-1.html >
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Re-2: ‘Frame/Screen-Grabbing’ using the Panasonic ‘GK-4’ DSLR in 4K video mode.
LINK:
<http://noamkroll.com/the-gh4s-4k-photo-mode-explained-why-it-might-be-a-huge-feature-for-filmmakers-in-the-future/ >
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(( The above is an excellent treatise on that subject, however it’s now effectively three years old (March 2015 — BTW, be SURE to read the 53 Comments by fellow-pros, they were VERY Informative for me. ))
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Re-3: Sony A9 Speed Review: It's HERE!!!!
LINK:
<https://youtu.be/QJQqOp18k0A >
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Dear Fellow Hogs,
Personally, I’m still hung up on Videoing in 4K or even 6K or 8K (both at 60fps If possible), and then ‘frame-grabbing’ the precise ‘moment’ that will produce the ‘specific’ composition that is desired (by further cropping and/or rotation and/or blurring). — Remember 4K will yield an 8MP captured-still, whereas a 6K or 8K yields a ?MP still. — Naturally I would additionally need a ‘tool’ like the ‘VideoPix’ App, which I use with the vids produced by my little Apple iPod Touch.
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So, the questions are:
1. “If a 4K Video yields an 8MP Still, what will the yield be (in MP), for a 6K or 8K Video.?
2. Would Any Hog, consider using THIS technique for a Paid-Shoot (ex: Wedding, etc.) ...Explain please.
3. How or Do you see the Sony ‘a9’ fitting into this dialogue, with its 20-fps shooting speed. In what WAY would it be able to produce the ‘Precise Still Required’ for your paid shoot.?