Well, for those players and singers that like to play a different set of 60-70 songs each gig, having a resource like Unrealbook and the iPad makes it do-able.

I for one cannot remember chords and lyrics to over 1000 songs (my current PA2 Songbook resource)

If you are saying you CAN do this (remember the chords and lyrics to 1000 songs and NOT just 2 and 3 chord tunes either), well then, I have to admit I find that difficult to believe....

Maybe you can, but you would be the first I have ever come across in over 35 years.

Thats why I said TOSH to your post. Also a player CAN be very creative and spontaneous with a chart. Chart reading does not inhibit "free-style" playing!!!