Besides the additional security concerns with NXT and PoS I don't see how the direction will move to a more egalitarian distribution model. Centralization of mining I believe is merely temporary(Asic space heaters and hot water heaters may be a great future to recycle all that wasted heat. )  Bitcoin and Nxt both have finite supplies and when most of the btc is mined all those miners will have to depend upon transaction fees for profit just like in NXT forging. The difference between the two is that with bitcoin their are high maintenance(electricity and equip) costs; profits from transaction fees are linear and competitive with new entrants adopting new technology everyday. With NXT you can effortlessly scoop up most the transaction fees with no competition further securing your dominance. Large bag holders from nxt may eventually be able to hold onto their initial investment and use the "interest" from transaction fees as spending money.

This is further exacerbated with crypto currencies because a portion of those anonymous investors will choose to not pay taxes thus aren't subject to progressive policies of wealth redistribution as we see with fiat.