That's not fully correct. CDG and ORY have integrated (or close enough) high speed rail stations that serve other large cities, although that's probably not a great bet.

Most importantly, however, the law being discussed doesn't ban connecting flights. So a NYC -> Le Mans (say) would be allowed to fly through CDG, even though Le Mans is at around one hour by high-speed rail.

However, as there would be less traffic on these routes, I do expect some of them to be more expensive or even dropped altogether.

There's also a provision for "zero carbon" flights which would be allowed to operate on short distances.

The actual law (in French): https://www.assemblee-nationale.fr/dyn/15/textes/l15b3875_pr...