Yes. Original iPhone had proximity sensor.
unobtrusive notification: this will be fixed in iOS5. Android copied this idea from an app on Cyndia store. Apple hired the programmers to make a official iOS version.
3D = I would like to see a 3D version iPhone. I have a 3Ds + 3DTV+3D computer. In one year I have seen 4 films in 3D. It's a gimmick.
SD card is a gimmick. Space is no issue with the cloud. iCloud automatically pushes out all your photos, movies, books, mp3, radio...