I remember that Ozmodchips previously reported a DSi "Channels" Exploit, and yet nothing ever surfaced from that.
What's more is that although the 3DS top screen is fully light, software run in DS mode with a totally black image on the top-screen may simply appear to fill the whole top screen. This is because the black DS-aspect ratio image becomes indistinguishable from the black borders. You would need to see an image on both the top and bottom screens that is not just solid black to dismiss the possibilities that it is just an image viewed on 3DS Photo or an NDS homebrew application.
There is also the fact that the 3D light indicator is not lit, which is another possible indicator that this is an NDS homebrew, although many 3DS softwares also disable this 3D light as they lack a 3D mode (Pokémon Dream Radar, Cubic Ninja, Virtual Console software in upscaled mode)
So for the time being I remain a skeptic.
What's more is that although the 3DS top screen is fully light, software run in DS mode with a totally black image on the top-screen may simply appear to fill the whole top screen. This is because the black DS-aspect ratio image becomes indistinguishable from the black borders. You would need to see an image on both the top and bottom screens that is not just solid black to dismiss the possibilities that it is just an image viewed on 3DS Photo or an NDS homebrew application.
There is also the fact that the 3D light indicator is not lit, which is another possible indicator that this is an NDS homebrew, although many 3DS softwares also disable this 3D light as they lack a 3D mode (Pokémon Dream Radar, Cubic Ninja, Virtual Console software in upscaled mode)
So for the time being I remain a skeptic.