Nintendo Switch is off to an incredible start, selling nearly 15 million units by the end of 2017 and smashing records to become the fastest-selling console in United States history. With Switch outpacing Wii and PlayStation's early life sales, the sky is the limit, and there's no telling just how many units Nintendo will sell. According to one analyst's estimate, Nintendo Switch will go on to be the highest-selling console of all time.
That's according to Nikkei Asian Review, the world's largest financial newspaper. Their latest report on Nintendo's surging stock indicates an analyst estimate of 200 million lifetime sales for Nintendo Switch. By comparison, PlayStation 2 sold around 155 million and DS was just behind it. Game Boy / Game Boy Color sales combine for 118 million (if you consider them a single brand), and the original PlayStation and Wii each sold just over 100 million.
This would be an incredible feat for Nintendo to accomplish, but it's not entirely outside the realm of possibility. As a handheld device with home console functionality, Switch could undergo multiple revisions, like the DS and 3DS families did. Additionally, Nintendo legend Shigeru Miyamoto recently indicated that Switch could have a longer life cycle than the traditional 5-6 years.
Source: Nikkei Asian Review