I'm not convinced that mBTC is a good idea. Seems like some people just want to fool the market and noobs into thinking that bitcoins are cheaper than they are. One thing about Bitcoin is that it is the first 100% honest money. If it costs $1100 for each coin, then so be it!
I think it's evolution, not just for the noobs. Unless you look at it as commodity, not money. When my friends ask me how much have I paid for something in BTC, answering something like 0.055 sounds geeky, but that doesn't serve a purpose.
I think its fine for websites and shops to use mBTC. But the exchanges are a different story. Google shares are $1050, Platinum oz is $1350, Berkshire Hathaway shares are $172k. Let's see Bitcoin pass this sucker: