OP, nobody makes extra money from you trying a 28mm tire. They usually cost exactly as much as 25s despite being made of more rubber.
You might be right that people will eventually go back to narrow tires, and I could tell you a bunch of reasons why you should try 28s anyway but there’s plenty of literature on the internet to help you with that.
Just keep in mind that the benefits of wider tires and lower pressures are far more apparent with high end, supple tires. Unfortunately, these rarely last too long and are usually quite expensive. The GP5000, Vittoria Corsa 2.0, Hutchinson Fusion, and maybe the upcoming specialized RapidAir are some examples of tires that you might try the 28mm version of. Tires are a wear item anyway, and I promise you that you won’t *hate* the 28mm tire as long as you set the pressure appropriately and understand that smoother is faster.