The comments come after Scott Steinberg, Sega vice president of marketing, revealed he believes the Wii will be "dated" in a couple of years.
Speaking to GamesIndustry.biz, Pachter said: "I think that a lot of people consider the Wii a "fad", and attribute that conclusion to the type of people who have been attracted to the Wii so far."
With asked for his comments on Steinberg's claims that developers are reaching their limits when it comes to the Wii's remote control, Pachter said, "I can't begin to imagine what is on the drawing board for the Wii, but I can say that most developers I've spoken with are extemely excited about the potential for the console... I believe that we've only just scratched the surface.
"Also, Scott's analysis presupposes that we have seen the last in hardware innovation from Nintendo. I disagree. It's easy to envision a Wii 2 in a couple of years that runs at full HD, and has both a Wii-mote and an analog controller, so that all games can be ported to it.
"If Nintendo were to introduce such a device, it would be fully comparable to the Xbox 360 - perhaps it wouldn't have Blu-ray, so a comparison to the PS3 may be unfair - and would likely have most of the same third party content as the other two devices."
But Pachter did agree with Steinberg that the PlayStation 3 "will ultimately come out on top". Victory, he predicted, will be the result of a console price cut to $199 and the success of Blu-ray.
Price point is key, said Pachter - stating that 80 per cent of all Xbox consoles sold in the US were $199 or less, with the figure approximately the same for PlayStation 2.