The fork will happen on January 16, 2019 - right?
So do you think this can be a great day for ETH or just a normal update?
The price right now is not making any big move, what do you think will happen tomorrow?
You should be know that it has postponed to January 19 and there is no connection of big move because this is a system upgrade in ethereum blockchain. It was PoW only coin but now it will implement PoS too which means you can get rewards by staking.
It's for the future and not now. The next hardfork wil try to implement a part of POS update just like put difficulty bomb delay and that's it. But the decrease of inflation in the ethereum supply will give an impact to the price of ethereum. inflation has become the main problem in the POW.