Hi vikram,
All th above tech is good in something. say LTE-U is best for cost wise and coverage imorovment. With LTE-U operator can achieve a greater data rate for long coverage But it is not good for wifi hotspot because it will create interference.In Highway this is good option to deploy, however wifi hotspot wont be there so you can deploy to reduce licenced band cost.
LAA is best option in cities because it will have assistance of licenced band and having mutual understand between wifi. so both tech mutually works.
LWA is best option in theatres and malls, because wifi is shorter range and you can reduce the load of ENB by aggrecating data by wifi.