I don't think the Ethereum network congestion can reduce with time.
It's far from the horizon. And many projects and investor will find an alternative platform than staying with ethereum with high gas fees. There are a lot of blockchains out there better than ethereum and has a lot more features and scalability to offer. And the migration to the new protocol won't solve much of this problem. This will impact the market greatly especially the projects that are primarily using the ethereum blockchain.