Another thing... what exactly are people expecting to see on the screen? Personally, I haven't imagined anything polygonal. Maybe I'm biased from 8 years of DS play, but all I'm seeing in my head are inventory screens, maps, HUD being cleaned of the main TV and relegated to the controller screen... nothing really crazy. I think it's a damn shame that what essentially equates to hitting the start button is holding us back from 1080p or 60fps.
This is entirely the wrong way to think about it. Performance can be dynamically allocated to either screen, so a game that's only throwing 2D elements on the pad will have more power available to it than a game that uses both displays heavily. This is probably not sufficient in and of itself to shift an engine from 720p to 1080p, but will have a noticeable effect.
If the system doesn't deliver 1080p, it's the power, chassis, and silicon profile that Nintendo's chosen that's holding it back, not the pad. If it doesn't deliver 60fps, it's more likely due to the fact that developers have chosen to prioritize lighting, surface, and static image quality processing over framerate, not the pad.
In any game for which it's the display sent to the pad that's holding the main display back, I think it's safe to say the display on the pad will not resemble your DS experiences.