Maybe you can change the horizontal frequency enough to make it display 720p (about 2.7 times the NTSC horiz frequency) or 1080i (about twice the NTSV horiz freq) B&W HDTV. Use the green jack on the "component" outputs of a HDTV receiver box.
That would make it a nice mix of vintage and modern. If the spot size is small enough, it could make a really sharp picture.