I dont think that's what the OP meant.  Big miners are slowly taking over the market, like banks.  The all important comma.  Large scale miners are becoming the banks of the Bitcoin world. 

It is inevitable, as cost increases to obtain and host ASIC servers on a scale that's efficient and ahead of difficulty, it becomes a business rather than a home/amateur hobby, and those businesses will dominate the landscape.  Once there were hundreds of banks, each city, region or province had its own or several.  They expanded, taking over some others, becoming more efficient due to scale, growing further.  The small ones either get swallowed up or remain with a tiny market share.  The pools might mitigate this, but they are analogous to building societies/credit unions and i'd expect a similar outcome (i.e. remain, but sidelined to a small market niche).