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How do you see the future of small scale car sets in the future? I'm talking next decade or so. We have Speed Champions but it's obvious that despite being detailed and realistic the car's aren't exactly "correct" dimension-wise. Seeing how much Lego pushes screen accuracy in the Star Wars line and how much SC has pushed the realism aspect of small scale set design, it's to be expected that Lego will attempt to bring car sets of the future even closer to their real life proportions.
The minifigs are the bottleneck here. Having recently built the Senna it's pretty obvious that you can't make a Lego car much lower and sleeker if you also want a driver to fit in. However SC cars are already oversized in length and heigth; arguments can be raised for and against transitioning to 8-stud wide builds exclusively, a technique that yields an evidently higher level of realism (/lg/ threads have had great examples of this).
Then again, if they decided to ditch the inclusion of minifigs completely, they'd be able to make cars the cars much more flat and realistically proportioned. Something like Tiny Turbos, but with SC level of detail.