If someone had space for, say, nine pins max - they could have their 8 favorite games plus one virtual pin cabinet that could theoretically emulate every game they don't have. A friend of a friend did this, but then he got to comparing the eight games he had with their virtual counterparts and saw how the virtual versions just didn't measure up. He wound up selling the virtual cab and replacing it with a ninth actual pinball.

It sounds like the smaller your pin collection - the better for one of them to be a virtual cab to expand the number of games to play. How small a collection needs to be for a virtual pin to take up a spot would be up to each individual, since one person might find enough variety in owning four actual pins while another person might prefer three actual plus one virtual.