It is a duplicate, but of an even earlier question: Most wanted feature for C# 4.0?
Aside from the version, the question is literally identical to the previous one;
The old one might as well be closed/locked as "Too Localized", since C# 4 is already out. But it could easily be edited to be for C# 5 without loss of context. In fact, it could be edited to be for any arbitrary future version of C# and the question would still make sense, as long as people edit their answers accordingly if/when a feature is actually implemented.
Most of the answers to the new question are identical to answers in the old question!
Regardless, if you disagree on that point, the new question is still hardly an awesome question. It's barely a question at all - to me it's just noise.
The speculation (rumours) question can actually be answered with facts, scarce as they are right now. The new question is soliciting opinions, and to no particular end. It's just another discussion question with zero educational value and everybody throwing in their two cents (and upvoting/voting to reopen in order to keep the question alive so that they can keep the badges they earn).
If this question were an isolated incident I would probably have just let it slide. But there have been so many of these kinds of questions coming up lately, we're already seeing and will continue to see a cascade effect where eventually every question that's even remotely related to software is fair game.
Choose your close reason; almost all of them apply. It's NARQ because it's really a poll, not an answerable question. It's S&A because there are no facts in support of (or against) any answer. It's an exact duplicate of a much older question with the version number changed, and very nearly a duplicate of a newer one that was worded better. In a way, it's even off-topic, because none of the features exist (and most probably never will, or won't for some time), and therefore aren't really relevant to programming in C#.
So, maybe as a dupe it references the wrong original question. Or maybe it was even inappropriately closed as a duplicate. The fact of the matter is, it needs to stay closed, otherwise it's going to become another poster-child for bikeshed questions (the same question can be recycled for all versions of all products).
Let's just leave it alone. Please.