Sounds like it. Also, with the movie thing...that's what my gbaMP said (gba movie player). Turns out you had to conver those files into another special format using included software...LAME! It's rom compatibility I'm worried about.
Updated: Gamezway provides preorder now.... here is the purchase link: http://www.gamezway.com/ex4-ds-for-nintendo-dsdsldsifree-shipping_p17509.html if having an interest,go and see it.
Pictures are one thing. I can slap a picture of a GBA game on my DSi XL and say that my AK2i runs them. Is there a video of this? I have seen a few videos, but what about the compatibility.