It could come down to CP for sure but the fact that they have boosts in gameplay for alpha and beta makes me believe its probably going to be similar with land.
Even if the top level players did have all those cards, they would run out very quickly if they had a lot of land to cover. I think that's the point Matt is getting at though. The older and rarer the card, the more it should be in demand. If they do this right, the demand for those cards will continue to grow forever as land owners slowly try to increase the output of their land by getting closer to the ideal. People might even start combining alpha and beta cards again.
I'm going to start picking up more alpha cards in anticipation. They are really cheap right now. At the very least, they should maintain a high rental value if I'm reading this right.