Is the Wii U Really Doing Bad? My Viewpoint

[SJReiter]

I may be mistaken, but is it really fair to compare sales of the N64, GC, Wii, and Wii U? I just feel like it's unfair to compare sales from the mid to late 1990s to the early to mid 2010s. I believe console sales should be compared to their immediate competition, and not past generations.