http://schema.org/TelevisionChannel currently doesn't have a property to hold genre

(There might be other Types in Schema.org within Entertainment, Creative forms that could also benefit from having a genre property)

(we have category available on Service http://schema.org/BroadcastService , but that's different )

Use case Examples:

{
"@context":"http://schema.org",
"@type":"TelevisionChannel",
"name": "ESPN2",
"genre": "Sports",
"broadcastChannelId":"016",
"broadcastServiceTier":"Premium",
"inBroadcastLineup":{
"@type":"CableOrSatelliteService",
"name": "Comcast",
}
}

{
"@context":"http://schema.org",
"@type":"TelevisionChannel",
"name": "MTV HD",
"genre": ["Music", "Reality"],
"broadcastChannelId":"69",
"broadcastServiceTier":"Standard TV",
"inBroadcastLineup":{
"@type":"CableOrSatelliteService",
"name": "TimeWarner Cable",
}
}