True. Plus, it seems people here are not assessing priorities in a good way. There's no big issue with current e-bay-like markets. The biggest priority is exchanging bitcoin <-> fiat anonymously, IMHO.
If you want to dedicate hard work towards something, I'd say building a more anonymous and/or decentralized money exchange is where you should focus. There are some interesting ideas around here, like this and this, but all them need someone willing to do the hard work and to take the inherent risks, obviously.
same thing i'm proposing only use the same "wheel" not reinvent it, satoshi already did