Irisin: exercise in a capsule?

Just saw this on "the news". Supposedly, exercise stimulates the production of irisin in muscle tissue; irisin is a protein. Irisin supposedly converts white fat into brown fat. Why this is relevant? Brown fat is more metabolically active than white fat, it plays a role in heat production. Irisin also supposedly increases glucose tolerance; possible treatment option for diabetes? Irisin may also aid fat loss. I'll have to look, but I believe the only research has been done on mice. Will irisin turn out to be a wonder drug? I wouldn't bet on it. Why not just exercise? It would be awesome if irisin turns out to be an effective treatment for obesity or other diseases of civilization, but this is another example of why we suck; an easy fix for our terrible lifestyle. People would rather swallow a pill than take responsibility for their health by eating a healthful diet and exercising.