FIA and F1 are trying to make them smaller and lighter in the 2026 rules.
Really hard thing to do without making the cars less safe as the modern crash structures are one do the main reasons for the size.
The plan is also to remove MGU-h (waste engine heat to electricity) and add active aero while still keeping the cars roughly as fast as current regulation ones.
Cars used to be 1.8m wide before they became 2.0m wide. I'd prefer smaller to see the technical brilliance work with less.