While I think doing this might be really good for some altcoins, I doubt we see that anytime in the near future. This same kind of practice happens with fiat too. Every fiat currency is measured to the USD and when the US government decides to change their monetary policy (increase or decrease supply) you see that trickle out and effect many foreign currencies. Same thing happens with bitcoin, albeit not by means of monetary policy, rather the market sentiment. I don't really think you'll ever get away from having a reserve currency, whether crypto or fiat. I can see the advantages and drawbacks of both.