It would be great to see versions for older games. There isn't as much shown since it is often just a strip an inch or two high on each side. Those older games may end up with wear, scratches, etc and these could freshen up those game for people that don't want to repaint the inside edge of their cabinets.
I really like the ones that are an extension of the playfield and it is nice to see that some games have multiple options.