Ethereum "Byzantium" Upgrade Almost Here

The upgrade which is the first part of a larger multi-part upgrade, will come into effect at block 4,370,000. this is expected to be in the early hours of tomorrow morning.

What will this upgrade mean for miners, developers and investors alike ?

What I understand is that the intention of this initial upgrade is to make the etherium blockchain lighter and faster, which in turn should pave the way for better decentralized applications (dapps). For those of you who are concerned about privacy, the upgrade is also designed to enhance privacy on the network.

Will the blockchain split like in the previous instance or will the etherium network accept the upgrade and excel to the next level of social and economic revolution. This leads me to my next question if all planned upgrades go well, will the etherium blockchain eventually supersede the bitcoin blockchain in market share ?

for more info re the upgrade and source of my information follow this link https://www.coindesk.com/watch-ethereums-hard-fork-happens/