It depends on how good the PC is. I think a PC with a searchable database of songs and a database of lyrics related to songs would rule over any book.
That one question I hate so much...
"What's that song, it goes like "At first I was afraid, I was petrified."
It's the next logical step in karaoke kiosks. Sure, you as a KJ might be able to answer that question 10% of the time, but the PC can answer it 100% of the time with 100% accuracy.
Let's not forget things like "Preview/Listening Stations" If what I described above was standard at every karaoke bar, I would never want to touch a book again.
(BTW answer is DKK1-9, that was off the top of my head)
Hmm sounds like a kick-ass idea.. But i'm not sure how easy it would be to program.. But then, programming isn't my thing.. maybe you should put that on the feature request for kfe.