No, the SCOTUS decision is not an end to the bump fire stock cases. The appeals process is a song-and-dance number where everything must be done right and the judges (see what I did there?) must be happy with the choreography to the case to proceed. The plaintiffs got told to come back to audition against next season.
I can't say it better than someone else has, so here are two excellent explanations:
TTAG: "FPF: Today’s Supreme Court Denial is NOT the End of the Bump Stock Ban Challenge"
TTAG: "Justice Gorsuch’s Statement on the Denial of Cert in the Guedes v. ATF Bump Stock Ban Appeal"
Clayton E. Cramer
Gun Free Zone
The War on Guns
The View From Out West