Depends on the environment they have to adapt to. That is essentially unknowable.
I can, however, make a prediction about human evolution:
Our descendants, whether human or another species, will not have wisdom teeth.
Proof: Even with modern dentistry, people still occasionally get fatal infections from impacted wisdom teeth before they have had any children. This eliminates one copy of the genes responsible. Eventually (depends on how often this happens, which is impossible to predict), the genes are gone.
I find your example in post #510, about the wisdom teeth to be extremely interesting...because it does seem a few weeks ago, there was a discussion about this very thing...an Id/creationist supporter was really making some really absurd statements about wisdom teeth...claimed that wisdom teeth do not provoke any problems until the person with the wisdom teeth were old enough to have produced children...hmmm?...that is in contradiction to my case and my best girlfriends case, being that both of us had to have our impacted wisdom teeth removed when we were both in our early high school years, and not exactly ready to get married and start having children....when people start having trouble with impacted wisdom teeth can vary, and hardly happens to them all at the same time...
When this argument failed to convince the ID/creationist supporter that he/she was incorrect, he/she then went on to carefully explain, well, God put those wisdom teeth there so that when the other teeth further forward fall out, the wisdom teeth have the great function of pushing the other remaining teeth forward...after I had a good laugh at that one, I realized I was discussing with someone who would make up any old reason, taken out of thin air apparently, to validate why we still have wisdom teeth...
I believe you are correct, about your prediction that eventually humans will not have wisom teeth...we can see now, even in the existing population, the variance in wisdom teeth...my best girlfriend had 4 wisdom teeth, all impacted, and all had to be removed...I had 2 wisdom teeth, both impacted, and both had to be removed...my husband never had any wisdom teeth to begin with and neither one of my sons has had wisdom teeth...(and having no wisdom teeth, which so often do become impacted and infected, is a true advantage, you avoid extreme pain, and possible infection)..
My mother had none. I had only two.