Yes they do. "Buffs" in this context are the items that temporary boost your speed/stats/money/luck droprate etc. If it becomes visible as one of the icon in the upper right of your screen or replaces an older one, it counts as a buff.
Stuff that refill energy/health/motivation and have a 10...
If you could get that part from a recently added achievement, then probably other parts can be gained from other new achievements.
But we will only know that if/when they are actually added, don't think they will already share that with us before then.