@Fa5t3r - I bought a few orchids a while ago and they died on me because I didn't know how to care for them properly. Turns out it wasn't the orchid I was killing, it was the rhizopus mycelium in the soil that they needed to grow.
So fungi is definitely used in horticulture at the moment. And when you look at how much the economies of Asian countries (which eat far more mushrooms of various types than Western countries) are growing, I think there's going to be a bigger and bigger market for all kinds of fungus soon. And that means lots of research opportunities.