Has the renewal price of any popular TLD _ever_ gone down? I guess you could argue that it has effectively gone down when staying the same due to inflation.
The original price of .com, .org, .net, etc was $50/year, then $35, then network solutions lost its monopoly and today you still pay less..
Of course the other issue is the future popularity is unknown. I think a lot of the first wave of new TLDs are not so hot today, but maybe they aren't lowering their prices if their last cash is from domain renewals of those reluctant to move on.
