Though not explicitly mentioned during the Worldwide Developer's Conference keynote, the Apple TV will also be receiving an update to its differently-numbered iOS software in the near future -- one that supports iTunes Radio and offers a few minor new features. The first beta, which is referred to as iOS 5.4 (notably skipping 5.3 entirely), doesn't yet make any severe design changes but does add support for the forthcoming iTunes Radio, allowing developers a chance to test the service.
