It's still a virtual hotspot lol, but the point is that you can't use third-party software since it's not supported. Don't understand why but that's what Zaneris said anyway, give or take.Are you sure Netsh is something completely different to a virtual hotspot? I remember you still need two wireless cards for this or am I wrong?
I'm using an ethernet connection and my built-in wifi to sniff data and it works perfectly, both on Ubuntu and Windows 8.
What should I use for ARP Poisoning?
Also, will my 3DS and my PC still be on the same LAN if one connects through wifi and the other connects through ethernet?
Maybe that's what softwares like Connectify uses. Explains why they only works with Win7+.
If both devices go through one hub, it's still on the same LAN. Can't help you with ARP Poisoning though haha, don't know anything about it.