ARM11 DS Emulation?

I'm not sure if anybody has talked about this, but why hasn't anybody talked about making a DS Interpreter/Emulator that runs on the ARM11 CPU instead of the ARM9 one?

Forwarders is an easier approach but think about all of the benefits that running DS games on the ARM11 mode would give. Probably better framerates, and maybe even a feature where it could add some upscaling and wide-screen support.

I do have a bit of knowledge of programming and I understand that this approach is heavily complex but I'd be very curious to give it a go.