First, I want to thank you all (especially Zeta, who crafted many hilarious, at times ludicrous, lines!) for turning this thread into a goddamn masterpiece.
Second, although there have been some persuasive arguments/counter-arguments presented, I was surprised by how the "16-bit wars" we're characterized by...
everyone. It was never TG-16 vs Genesis at the dawn of the 16-bit era. It was Genesis vs. firmly entrenched NES. And the NES wasn't dethroned instantly, simply because it had aging hardware. Far from it.
A crucial piece of the puzzle you folks missed: The NES never died! It would be far more accurate to say that the NES led a full life and gradually receded (faded) from the market. So, really, our beleaguered (doomed) TG-16 and the (Young Turk) Genesis were competing with the NES juggernaut, first and foremost, for the price-sensitive consumers (parents) of the mainstream market. Forget about any niche markets (NEC's business plan was intent on capturing the mass-market—at least, that was their original goal upon launch). We have already established that mass-market, mainstream success (NES) creates a momentum that insures continued sales—despite fresh, new competitors (Genesis, TG-16). Let's not forget that the existing user base for NES was huge, with money to spend on new software, thereby ensuring that publishers would continue supporting the aging NES. Surely you remember how many fantastic NES games were released in late-1989, 1990, 1991...some of the most critically acclaimed and profitable NES titles
co-existed with the dawn of the 16-bit era.
Why bring this up? The continued success and popularity of NES pushed TG-16 even further into the periphery.
Brand recognition? Must-have games that everyone is talking about? Software that you can easily lend to/borrow from others? The NES was crushing even the mighty Genesis (and Sega had superb marketing and a compelling library of games).
What were parents/price-sensitive shoppers going to buy in 1989 and 1990?
NES. (Everyone has one! It provides good entertainment for a reasonable cost.)
What were folks with more expendable income going to get?
Genesis.
What was Zeta going to buy?
He saved his money for years and purchased 3DO at launch.
What was Cook going to buy?
He was busy playing the games that were included with Windows 3.0.
What went wrong with the TurboDuo?
Wrong question. We should be asking ourselves: "How did TTi manage to launch the Duo and stick around for as long as they did?"