[steve-b]

The essential problem is that a "limited" term which can be retroactively extended is not in fact "limited" at all -- but in a way that makes it difficult to pin down a precise point at which the "limited terms" clause of the Constitution is violated.

[Petronski]

I agree. I mean to say the decision is correct on the law, but is in principle a bad thing. I think the proper place to seek redress in this matter is Congress, not the Courts. I do think we are getting close to crossing the line of what 'limited' means in this context, but we are not there yet/now.

[CatoRenasci]

I suppose the only ultimate limit on copyright terms will be the Rule Against Perpetuities -- lives in being + 99 years.