"Cutting edge" is not equivalent to good, although "cutting edge" work can be good.
An edge "cuts" when it separates one part from another. Something is only "cutting edge", when it marks a distinction between what follows, and what has gone before. If, someday, many people say something like "the photography Matt King did in 2005 changed the photographic landscape" then I guess I will have been working at the "cutting edge" during this year (there is absolutely
no chance of this occuring).
You can only truly tell if something is cutting edge, if you have some perspective on it.
If you are in the midst of doing "cutting edge" work, you are probably too close to it to be able to tell.
My suggestion to anyone seeking to do "cutting edge" work - use your own impression of discovery and inspiration and wonder to measure whether your work is successful. If there are others whose judgment and perception and knowledge is respected by you, ask them as well. Leave it to strangers with perspectives different from yours to worry about whether your work is "cutting edge".