Is there some strategy for customers once the cloud servers shut down? The company doesn't have to go out of business - perhaps five years have passed and you've moved on to more awesome models. While your business might feel that customers should upgrade to the newest, it's not great that they would be forced to.

For instance, when Steam was first released Valve promised that should the authentication servers go down, they would ensure that the games would stay functional without them. This was an important point that contributed to its success.