Like I said anything could happen, Nintendo is against piracy so they could figure something out to stop people from using emuNAND entirely if they really tried, they patched all previous exploits that allowed kernel access on 7.0 so why can't they find a way to stop emuNAND :/
They cannot stop emunand they can only make crap not work correctly in it which can be bypassed once GW releases a new patch, however i can almost guarantee that nintendo will start placing piracy measures in new released 3DS roms which will attempt to detect the use of a gateway card and thus make the game unplayable or patch the system's exploit that makes gateway work.