There is one extreme end of this discussion where people suggest that the end of consoles are nigh and everything is dying soon. This really isn't supported by the evidence, and I find many of the people who are most adamant about this idea are ideologically motivated. They may be Nintendo fans (Based on post history here) who are unhappy with how this generation has gone, or PC fans who just want consoles to go away. Either way, it's something they are not just suggesting will happen, but often seem eager for. I am not the first to make this observation.
Conversely, however, I find that there are people on the other extreme who like to suggest that nothing is wrong. They will often argue the Wii is a "fad," with the implication being that it was just some anomaly which can be safely ignored, and when you do just ignore it, then consoles are fine. I find these people are frequently motivated (again, based on posting history) by the opposite ideological agenda: they are particularly tied to the traditional console ecosystem and don't want to hear that there are serious problems or issues with the market.
Just to restate my personal analysis here, it is this: the console market faces significant problems going forward. They've been bleeding market share to browers and PC and mobile for nearly a decade now, and that trend isn't abating. All the while, development costs continue to go up relentlessly. Despite these problems, however, there is a healthy market of dedicated console enthusiasts who are sustaining the market right now, and the contraction does not indicate some sort of catastrophic collapse in the forseeable future. In other words: there are serious problems, but not "consoles will be dead soon, this is the last generation, abandon ship" type problems.