I really don't understand why anyone would make a 4k/120fps game when hardly anyone has a HDMI2.1 compatible tv... This sounds more like a marketing scheme than a true next gen game reveal. Oh, well lets hope not all Series X games will be aiming for such crazy fps and resolution numbers.
Well most TVs even if they use hdmi 2.1 probably won't have true 120fps. But what would be the problem that a possible indie game with light load decide to make 4k120fps and offer a very smooth gaming for whoever have the TV or decide to put in a monitor that is fullhd or 1440p 120fps? It is giving more options for gamers to choose, and if it helps market so be it.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
Azzanation: "PS5 wouldn't sold out at launch without scalpers."