Poor Wii getting slandered in here. The best selling PS3 game is GT5 at almost 12 million, then Uncharted 3 and TLOU at close to 7 mil. On the 360 side of the equation, Halo 3 is the top selling exclusive at a bit over 12mil. Interestingly, the COD games from MW2 to BLOPS2 did very well on 360, in the 14mil range, outselling all MS exclusives unless you consider Kinect Sports.
In comparison, Mario Kart Wii sold
37 million copies. NSMBWii sold 30 mil, Wii Sports Resort, 33mil, Wii Fit, 22 mil. If you think about it in terms of attach rate, these exclusives absolutely smoke that narrative as clearly more people resonated with specific exclusives on Wii. If the arguement is "the Wii's exclusives didn't do shit", the numbers don't back it up. It doesn't matter if those games don't directly appeal to some people in this thread, cause they certainly appealed to many others.
To the OP, access to exclusives is part of the plan, but definitely not the the sole aspect. Exclusives are one of the factors a platform holder can really control and are a direct strike against the competition, however as alluded to in the thread the Wii U had this benefit and still fell on it's face. This is because with regards to consoles, timing, marketing, perception, pricing, and to a degree hardware, also matters. And probably more!
In the Wii U example, it
- came out too late - one year before PS4 and Xbone
- came out too expensive for their consumer base at the time
- came out with poor hardware
- came out with poor messaging and marketing - even gaming media at E3 had no idea what it was at the unveiling initially
Wii U is a great system with great games, but it had
none of those factors in its favour. The PS3 at launch shares so many similarities with the Wii U, but Sony literally addressed every one of those above factors that they could in order to turn things around. The Slim leading to a cheaper system. Improved development tools to allow an easier time of dealing with the hardware. That led to some of the PS3s best selling games in TLOU or Uncharted 3. Changing marketing strategies.
Exclusive games should matter but the exclusivity of a game is not the only factor that will sell it and the platform. It needs to be a good game firstly, and the game and platform relatively accessible and known as well. A perfect example of this is Among Us - it didn't blow up until people
actually knew about it. Half Life: Alyx is an amazing game for VR, but people aren't running out and buying VR headsets for the game, presumably due to cost and/or lack of hardware for sale. Our hobby is filled with people looking for hidden gems. I think there is an understanding that not every good game sells, for whatever reason. While I and others would like for it to be so simple, frankly we can't be that reductive.