Guys guys guys....don't jump to conclusions just yet. Sony will not screw this up, since they stand to earn huge amounts of money from it. Here are a few points to consider:
1) Ticket sales should be available both ONLINE (cinema website) and right at the theater. So for people who cannot order online, they most likely will just have to drive to the theater, go to the front concession stand and buy their tickets. This is going to be done over a 2-3 week period so you will have lots of time to get your tickets. However the earlier the better since there might be a line up in some regions!
2) Sony will most likely push the 2 week viewing back another week so THIS IS IT will be in theaters for 3 weeks. They are just saying 2 weeks to create a mad rush and huge first week sales. Only if the demand is there of course. So the chance that fans won't be able to get tickets is not likely. So relax, you will see it!
3) If for some reason you miss the theatrical viewing then you can get the DVD which I guarantee will be out in either the last week of November or first two weeks of December. This is the time period I imagine the CD will come out as well, unless Sony plans to get it out in the last week of Oct to coincide with the movie.
So don't worry guys, Sony has chosen a different route but they have their reasons for this. I think it will still be a success and we just have to be happy that we have the opportunity to see Michael in the cinema! And remember we DO NOT know all the plans yet, or the exact content of the film. I guarantee they will have lots of Michael performing as that is what people want to see. So wait and see and I have a feeling we won't be disappointed.