What is the current development status of Transparent OLEDs?
Samsung has shown several different transparent OLED displays in the video here.

When they will come to the masses remains a question. One company that is close to providing transparent OLED displays to the public is Planar.

Adding a capacitive touch film on top of the display would be fairly easy, as this technology has been around since the 70s. I don't see any reason why adding a capacitive touch film would be troublesome for OLED displays.