Why are people still calling the Xbox 360, the Playstation 3 and even the Wii Next-Generation Consoles?
They aren't. Not any more. They are current generation. They are out, we are playing them, we can go out, buy one and be playing it right now. Next-Generation implies the next generation. The PS2, the GameCube and the Xbox were all known as Next-Generation before they came out.
What gets me is that even developers are still calling them Next-Gen. I almost threw up when Cliff "CliffyB" Bleszinski said "Let's get back on Xbox Live for some next-generation gaming" during the Gears of War Map Pack 1 Preview movie. Maybe he slipped, maybe he was referring to playing it on an unreleased Xbox Three-Hundred-and-Sixty-One.
Seriously though, stop it.
If anyone mentions NextGen to me I'm instantly going to assume they mean whatever the successors to the 360, Wii and PS3 will be.