Camera makers need to come unstuck from three things:

RichA wrote:
1. Fixed ISO values of 100, 200, 400. Most if not all have already
done this and offer interim values as a choice and even finer values
in semi-auto modes like intelligent ISO, etc. How about a continuous
motion dial that would allow you to set exposure via the ISO and leave
the shutter speed and aperture of the lens fixed? A kind of manual
intelligent ISO

What the f$ck for? Fractions less than 1/3 stop don't matter. Your
Nikon has Auto ISO - just set it to manual exposure with auto ISO on,
and it already does what you suggest as a "new" feature in an auto mode,
or switch auto-ISO off and press the ISO button and use the command dial
button to set exposure via ISO manually.
2. Maximum apertures on lenses that follow the old formula, f1.4,
f2.8, f4.0 etc. No reason why they can't offer interim values, it
might even work into a marketing tool like having a sensor with 10%
more pixels. For instance, a continuous aperture zoom from 18-55 at
f3.5. Cheaper than an f2.8 and lighter, but not dog-slow like an
f3.5-5.6, which is what we see nowadays.
There's a 16-35 F4 Nikkor, and several Canon f4 fixed aperture zooms.
Why not f3.5? Well, why not f3.75428698465. Stated maximum apertures
are usually nominal not exact anyway.

3. Sensor sizes. There is and has been no need to stick to fixed
sizes with digital sensors.
Well there's been a very good reason really. APS-C for sensor cost
reasons, with now a large range of OEM and third party lenses designed
for that format, and 35mm using old and newly released 35mm format lenses.
There is no reason a company couldn't
release a larger than FF sensor, and still keep the camera
manageable. A 50% increase in sensor area would allow for a nice
resolution jump, or better noise control, depending on the pixel count
and although it would mean a new lens group, Leica did it, so how
tough could it be?
A 50% increase in sensor /area/ makes SFA difference to anything, but
creates a niche orphaned (for general use) product, like APS-H.
There's plenty of good reasons IMO to stick to a few standard formats in
interchangeable lens cameras.
P.S. Nikon is very likely to release a sub-4/3rds sensor size in an
interchangeable lens camera in the next few months.
According to ... ?