Modern game engines aren't credibly capable of 4k gaming, given the market's desire for high refresh rates. The fine print will show that they are doing 4k@30Hz which is like going back in time to the PlayStation 2 era but with really fancy geometry.
The bar to clear is 4k@120Hz. However getting there requires a full stack refresh. A high end panel made in the last two years that not only can handle high refresh 4k, but has the required state of the art HDMI or DisplayPort tech to stream that many bits.
Since nobody else is in place yet -- the monitors, the game engines -- there's no incentive for the graphics card to be early to the party. RTX 40 series was for people with more money than market sense.
Nvidia is going to pay gaming lip service and bide its time until there's an actual growth vector in that space. All their attention is, and should be, on monetizing the 'AI' hype curve.