I fear for ETH future, almost all smart contract projects are using the PoS staking algorithm but only ETH PoW stands alone, this makes ETH different and one of a kind smart contract project, I think vitalik buterin will regret is decision after ETH goes PoS.
Before Mr. Butterin and the team make the decision, they probably anticipate the coming problems that may occur. But I think, whatever it is they know what to do and responded positively. We don't have to fear anything from changing it to a PoS system, I've been believing this may help and add convenience to the user and investors.
I definitely going to agree with what he made, he is even realizing the benefits it gives when switching to PoS.
As mentioned above, a crypto Point-of-Sale (PoS) is a solution for deploying a cryptocurrency payment gateway. The PoS system enables your clients to pay for goods and services with Bitcoin using their smartphone and crypto wallet. The main advantage of the PoS method is the convenience since it takes mere seconds to create an invoice that the customer can utilize to pay. The PoS gateway is also simple to use and does not involve building complex infrastructure.
source:
https://nowpayments.io/blog/what-is-cryptocurrency-point-of-sale#