What do you think about the Head Up Display ?
It is used in planes to get info on the peace of glass(plastiglass)
just in from of you.
How it works ...
You would have the same screen on your keyboard just like
every keyboard has right now.
In the same time the screen whould be used as a small projector which will project the
data upwards on the piece of glass which is placed VERTICALY at the same hight
as your eyes.
For example the piece of glass(plastic) would be part of the regular note stand which
usually comes with the keyboard and can be placed at the edge of the back plane.
Since it is glass or plastiglass you can still see through it and the audience probably
wouldn't notice it at all.
You would be looking at them and in the same time have the screen data in front of your eyes.
It is especially helpfull for people who use midi files with words of the song too.
Also you could have dedicated buttons, just above your keys(UP,DOWN,RIGHT,LEFT,ENTER) which can easily navigate you through the data on the screen.
With this system you wouldn't have to look down at all, keeping eye contact with nice ladies in
the audience.
In addition to airplane cockpit, the similar system is implemented on TV cameras where the speaker looks at it and read at the same time.
I saw a few conferences with the exacly same principle. You can hardly notice that the guy on the stage has a small piece of glass beside the mic where he reads the speach from.
Anyway it would be fun, don't you think ?
Cheers
Denis