I agree that it must make sense for a domain name and it's intention to be related to mobile use. I myself, do not like 2" screen gaming. However .mobi gaming names can still hold a punch EX: wireless laptops are still moblie correct? This is where I think .mobi fits in better for the gaming names and some others. While a name like "FlightCancellations.mobi"

can be just a simple messenging service