So here is my thing - I love my Pioneer VSX-1021. Currently have my 1080p video ran through it via HDMI. With that said, I am purchasing a Sony 4K TV. Will that render my 1021 useless? Can it support 4K pass through? Or do I need to buy an all new receiver? I hate to have to buy a brand new receiver if I don't need to.
Just use your avr for audio and if you do find a source that can play 4k then pass it on directly to the tv via hdmi (best scenario a unit with dual output hdmi so one can go to the avr, or it'll need another audio connection to go to the avr).