Of course, I'd like to see Arc on that list. It's the ultimate vaporware: the significance of its eventual delivery is of truly mythic proportions by now to those who've heard of it, and it promises wonders well beyond those of any other vaporware of which I've heard. It also inspires a more fervent and fanatical faith in its most devoted followers than any other vaporware I recall.
Plus, y'know, it's hip to be obscure. Or is that oblique? Oblong? Square, that was it. It's hip to be square.