The upgrade already happened and some changes already implemented like ethereum has burn mechanism and staking mechanism that already live and it can be used by so many ethereum stakers. This time the only main problem that must be fixed to increase the blocksize or make ethereum to be a scalable blockchain and you will be seeing this problem will be fixed once the next upgrade will be done.
I think that you can find that easily through internet and that will be so many latest article that will give you a good article and explanation about what will be coming soon after the next upgrade in ethereum blockchain.