This is good news assuming whom ever discovered memchunkhax2 ever releases it. Users on 9.3 (and perhaps 9.4. I don't recall when the arm9 exploit was patched. But it was NOT patched in 9.3. Only the Arm11 exploit was!) can possibly have an exploitable system now (that won't involve downgrading).
As for the rest of us. SNSHax and memchunkhax2 pretty much means that a whole lot of retail n3DSes still on the shelves are suddenly exploitable now. Even though there isn't a new Arm9 exploit past 9.3/9.4 (though it's not usable past 9.2 until memchunkhax2 is public). So it may get a lot easier to find a n3DS you can exploit once this is public. Once you have Arm11 you can downgrade the system to 9.2. Of coarse n3DS users still will be stuck with a emunand on 9.5 since new key for encrypted arm9 hasn't been found/leaked yet.
I don't own a n3DS and my 3DS XL which is in the pawn shop right now is already exploitable. Still good news to hear though.
It was actually Smea who released the info about SNShax and Derrek (I believe) who made the info that this thread is about available, he showed how memchunkhax wasn't fully fixed and how we might get the normal key (that's what he called it, I'm guessing this is akin to a common key?) And plutoo was showing how we might get the n3ds keys needed for emuNAND 9.5+
