At United Artists we did a classic Film Series for about a year using a dual laserdisc system and the permission of the film companies.
Please note that the word permission ment that we bought the laserdiscs on our own and we got to pay the film companies to run the show. I beleive it was $300 on average. Usually nobody will accept less than $300 because it doesn't pay to do the paperwork for less.
We ran one show on Thursday morning @ 10:00 AM. We got an average of 30 people per show. Even though we were using a Hughes JVC light valve video projector with a Farujia line doubler, I would say that the quality was generaly unacceptable. The Black levels were washed out grey and there was very little detail.
Consumer Video, ie laserdiscs, DVDs, and satalite TV is mastered for the 19" to 32" TV and it always looks like crap when blown up to very large proportions.
I have seen some very good demonstrations at trade shows but the source is always something like D5 and mastered to look good on that companie's video projector.
The best video I have run is Sony Betacam SP on a Digital Projection 8SX "Motion Data Projector". The Sony VCR cost $14,000 because it was playback only. The Digital Projection machine was $125,000. They do have a unit for around $50,000 which is quite good.
Anyway the UA series broke even finacialy only because they didn't have to pay for the theatre or the projectionist. We were already there. They were just trying to make some extra money during a period when ticket sales were slow.