TESS will be an interesting project to follow, and no doubt will yield many amazing discoveries - and for its size it is a technological marvel, but I have my reservations as to whether or not it will make as big an impact on the scientific community as Kepler did or James Webb will. For all its hype - TESS was stated by NASA as more of a gateway project for Webb and future ground-based exoplanet projects. Still, a space telescope that surveys 85% of the observable surrounding stars - SPECIFICALLY at type G,K and M dwarf stars - is pretty damn exciting. Finally a project designed with looking for Goldilocks planets in mind. Might it find an Earth-like world nearby? Probably not - at least, not alone. As stated before, it needs other interlinked projects to help it. What I find neat is that it will have a greater support network then Kepler did and will let scientists not directly related to the survey request targets and conduct studies, a little like Hubble.
I guess we will see what it discovers in 2019-2020+. Its an great time to be alive.