Ugh, sometimes I don't even see a reason to bother.
1) This person doesn't know how to actually implement an exploit. All he did was find a PoC webkit vuln and run it.
2) It seems like half of you people here think that this will let Gateway and others support newer sysnand. The ARM11 kernel and ARM9 exploits they were using were patched.
This does indeed crash a New 3DS web browser (I tried it) it seems to exit the browser gracefully and produce an error, which may mean it's not an exploitable crash.
What this -may- become is an entrypoint for 9.2 and LOWER on New3DS to be able to run Gateway without a prepared game to launch it.