Hi @vlemon!
I have read that they are planning to make the blockchain more scalable, their ambition is to transition to PoS and be able to manage a larger amount of transactions with less fees. I have also read that at some point some of the fees will be burned, and this will also help decrease inflation.
When Eth 2.0 is live you will be able to get some inflation like HIVE. It will depend on the amount of ETH locked. At the beggining the inflation "could" be high, but I have read that they expect that will stabilize around 4-8%.
I think that 4-5% could be reasonable.
I am considering to add more Eth to my portfolio just in case.
Cheers!