I may be eating my own words here as I am a fellow miner and run my own pool and have a fairly significant hash rate.
How will we be able to take back the mining power/hash rate from the existing BIG 3? it seems like they are getting beefy'er and beefy'er every three months and coming out with new hardware and keeping it to themselves. What will happen is they will run all of the transaction processing for the Bitcoin network or the majority at one point or another. I am pretty sure we are almost there.
TLDR; BIG 3 are going to be operating like traditional financial network that goes against Bitcoin's decentralized model.