Didn’t seem to have much use in urban settings
LiDAR is incredibly useful in urban settings actually... When combined with a multispectral scanner or land use data, they can codify the returns to low, medium, and high vegetation as well as buildings, power lines, etc... which can really help with measuring an urban tree canopy. Then considering the fact that many trees in urban environments are on private property, this gives you a means for at least getting some basic measurements from them without having to walk on to private property. It's application is broad and far reaching, so it can honestly be used anywhere.
If you're going to be using GIS for more traditional forestry, I'm afraid I can't help you too much there other than you can do some basic remote sensing, load in soils data, set up your timber cruise transects and what not... I've got a degree in forestry but I don't know squat about traditional forestry, just didn't appeal to me like urban forestry did so you may want to consult with someone with timber cruising experience and get their input.