 By 2008 , two years after the Wii 's release , Nintendo acknowledged several limitations and challenges with the system ( such as the perception that the system catered primarily to a " casual " audience and was unpopular among " core " gamers ) . Game designer Shigeru Miyamoto admitted that the lack of support for high definition video output on the Wii and its limited network infrastructure also contributed to the system being regarded separately from its competitors ' systems , the Xbox 360 and PlayStation 3 . 
