Indoor training on the bike is developing from a boring exercise, on rollers only, to a immersive experience.
Direct-drive trainers, rocker plates in many configurations, real life videos in HD, virtual reality in Zwift, animated 3D riders in 2D videos with Rouvy, and still more to come. Some of these developments help you to become a stronger cyclist. One of them is possibly enabling the rise and drop of the front wheel with the changing grade of the virtual road you ride. Rising the front wheel when training indoor, can help simulate your position on the bike as you ride uphill, which can aid in activating those muscles used when the trainer resistance is increased during climbing.