The arguments about why DRM is an inherently flawed system, is nearly always doomed to failure, technical failure, have been made many times here. Presumably we can agree that no attempt at controlling digital content after it has been released to the world has succeeded so far and many millions of dollars and hundreds of man-years of effort have been spent on the problem. I think it would be fair to say that it is not an effective solution to the problem of creating artificial scarcity for an infinitely reproducable digital/virtual good.
So what we are really discussing is whether a probably impossible version of DRM, a hypothetical perfectly effective DRM, perhaps using alien technology which would seem like magic to us, might be a useful thing for society as a whole to have.
If aliens landed and offered this advanced technology to the copyright cartels would we consider them benefactors or attackers? I suppose there is no simple answer to that. One group of people, those who create art works in digital form, would probably be better off.
They would gain one set of customers and lose others. Some of us would simply buy less content because we cannot sample it first. One might argue that content creators would be more likely to offer free samples if unbreakable DRM were around but I'm skeptical of that.
One set of people who would be hurt by this hypothetical perfect DRM are the poor who would never be able to afford to pay for it. One can argue back and forth about the justice of this but the fact remains that only the wealthy would be able to afford certain digital content.
Personally I think it would be nice if such perfect DRM were available. If someone invented such technology I would imagine that they would charge a great deal for it. Onlly the richest of corporations would likely be able to afford it. Small artists would still be left with only the sort of cracked-upon-release DRM that we have now.
I can think of one form of DRM that might be highly effective. Simply kill/maim/rape/imprison everyone who does not buy your product within a certain time period. Make buying your product a form of protection money. Again, in this system, it can be seen that one group, the content creators, are better off, while another, everyone else, is worse off.