I'm anything but an apologist for the current model. But if it disappears, we haven't necessarily made life any better for lesser-known artists. So if we are to remove one of the critical steps to success (i.e., the marketing and promotional spend of traditional labels, publishers, networks, and studios), we should hope that there's a viable replacement. Or we should try to build one.
In our haste to cast out the old guard, we tend to lose sight of the fact that the old guard still fills what appears to be a necessary purpose: the breaking-out of artists. I'm confident and hopeful that their crucial role in that purpose will, eventually, weaken or fade. But for now, it's still a strong reality.
Ultimately, we have yet to see indications that this new model is any kinder to small-time or nascent artists than the old model is. That's the big problem. The winners of the new model (Radiohead, Trent Reznor, Louis C.K., et al.) have first been winners of the old model. So it's very premature to say that the new model is better for the little guy.
To put it in financial terms: the new model holds bigger theoretical upside (share of profits) for artists and consumers (reduced costs). But it does nothing about the downside (risk of never breaking out, financial burden of building a fanbase, etc.), and may even make the downside worse for most artists. At least the little guy in today's model has a chance, albeit extremely slim, of getting discovered and catching a big break. But will the same thing be true in a pure long-tail environment? The jury is still out.