Though Ethereum still depends from Bitcoin, ETH has considerable chances to become a maket leader. It may happen in case ETH transactions become cheaper, faster as well as the speed of ETH minting goes down after Ethereum difficulty bomb activation.
After activating POS, surely the gas fee and speed of ETH will be cheaper and faster, but what does that mean in helping it take over BTC?. You mean it will be more commonly used. No problem, ETH is still at the forefront of dapps development or do you mean about its supply.
All that is still not enough for it to surpass BTC, BTC is still the most widely used and accepted coin. BTC is still there and it's been 13 years no one has surpassed it and it still is.