You will be worse. You will sit, and game, until...
You are comfy.
My chairs have always been humble. I could never complain about what mighty throne I could claim, my lumbar being secondary to my gaming experience, but I wouldn't object to the chance for real ergonomics, either.
My significant other got me my current office chair. It is nothing so luxuriously practical as the noblechairs selection, but it's absolutely serviceable. A lightly padded seat, with a black mesh material for it's surface. A worthy seat for the barstool it replaced, and of a quality to stand its own in the annals of office chair history. Despite the hilariously nubby armrests, I'm proud of it nonetheless.
However, I won't deny the longing within. The hunger for a true, comfortable PC gaming experience. The difference that a proper chair would do for my posture, my technique!
So be it. Let this be the time that I embark on the quest for ergonomics. For true comfort.