The life time product cycle sales figures of the Wii and PS4 will vary drastically; an apples and oranges comparison 6 months later doesn't mean much.
With the Wii, there was a product that was vastly underproduced initially, relative to consumer demand, at a broad market friendly MSRP of $249. The only thing keeping the Wii from selling far more than it did over the same 6 months was supply constraint, pure and simple. Supplies remained constrained for the better part of 3 years.
With the PS4, supplies were extremely constrained for about 4 months by comparison; they're generally available 6 months after launch, selling briskly at a $399 MSRP.
The big difference will be in longevity. By 2010, the Wii had already passed it peak and sales dropped quite drastically in the following years with support currently in the process of being cut globally. By contrast, every PS console has seen continued support for at least 10 years, with the sales to support continued production.
While there are arguments that the 8th gen will be over faster than any other and that everyone will be playing games on their cell phones and tablets or Windows PCs inside of 5 years (I don't agree), odds are the PS4 will be supported for 10 years, leaving a lot of time for the platform to accumulate sales.
The Wii was a quick burner; twice as bright and half as long. Playstation consoles on the other hand, tend to be consistent and continual burners.







