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
Western Rifle Shooters