They remind me of raptor feet silhouettes, with the dew-claw against the ground.
Do not temt the dino-nerd to go into nerdgasm!
I also like it. While I did find the beast-walk a little silly in Morrowind, I did like it better than the "New texture with tail and new head"-thing they had in Oblivion. It's a blurry picture, but it seems to be the best of both worlds. Human-like enough that armour will most likely not be that big of a concern, but beastlike enough to look original without going into anything too silly.
I hope for even more diversity between them. There are a lot of different shapes when it comes to reptiles and dinosaurs (To us picky nerds, dinosaurs aren't reptiles
).
Another thing about argonians: How is it with cold bloodedness? Yes, reptiles and amphibians, on wich they're based, are cold blooded, but I don't think that nesseserilly makes argonians coldblooded. What does the lore say about it?