I would say no. The benefit would be limited to what you can do on inclines and the impact on your flat ground training would be less.
Running is one of those activities where if you want to evolve a specific aspect of it, you just 'do more' of what you want to get better at. In other words, the benefits a runner gets from the different (running related) training options available to them is only going to evolve that immediate aspect of the runner's ability.
For example, if you want to be able to run for a long time with tons of endurance, run long slow miles. If you want to have energy available for bursts of speed (say, for an Xterra type event)? Do tempo / speed work. Finally, if you want to get up those hills faster, run more hills and inclines.
That would be why cross-training (strength training, Yoga, swimming, etc.) is necessary to make you a better-rounded athlete.