Actually 2 things:

- linux
- screen resolution

I came from a nokia 7710, with touchscreen and already a much higher screen resolution than the 320x240 must devices have.When the HTC HD2 was roumered to be an android phone I wanted to for that one. Unfortunately it wasn't an adroid phone after all but fortunately the n900 came around the block. But today the motorola milestone would be a good alternative....