We should make a clear difference here between any App Store and a computer App store. Sure, people will not care much when it's a computer app store, since the

We should make a clear difference here between any App Store and a computer App store. Sure, people will not care much when it's a computer app store, since they have long experience in installing programs without it. But when it comes to smartphone/tablet app stores, not being in one of them means your program is dead.