Apple AirPlay & HomeKit support will be coming as an upgrade to 2019 LG TV models so don’t have to wait to get a new LG TV.
AirPlay 2 support will allow for the streaming of audio and video content from your Macs, iPads and iPhones directly to the LG TV without the need for a seperate Apple TV.
HomeKit support will allow you to control your LG TV via HomeKit to turn it on when you arrive home or off when you are going to bed. It will also allow you to control the TV via the Control Centre on iPhone & iPad.
iOS 12.2, which is currently in beta, is the first version to support controlling HomeKit enabled TVs via the Control Centre.
Sony & Samsung have also previously announced support with Samsung being the only manufacturer to also pledge an iTunes app.