I replied about it in another comment, I say economic but truthfully it's mostly about governance that in turns applies to economics.
I'd say the changes won't affect SMTs.
Well hard fork 25 will be in a while anyways so with hf 24 not having too many eco changes we'll have almost 8 to 10 months of stability :)
I think that stability in the economics is going to prove very useful in the long term. I am looking forward to the governance changes, we really do need to solidify that part of the foundation but that is just my opinion on it and I am sure we are going to have a lot of various protection schemes come forth for us to think about, right now I favor the witness vote decay, but it is still early in the discussion.