In the least, well no, but I don't think it creates that much more awareness once the games are about to release only because they were featured in their E3 presentation, it depends more on how much attention Nintendo will give those games through advertisement and how much they make media focus on them with reviews etc.There's just no way to argue it won't increase sales, though. If you want to argue that it won't increase them enough to be worth it, then fine. But to say it doesn't affect sales in the least is absurd, imo.
There will be reviews, articles, ad campaigns and that sort of stuff. For their first party releases they have nothing to worry about. Now if we're talking 3rd party wise the situation is different, even with already announced games it's crucial that they show their games at events because unlike Nintendo they can't pull off that sort of mass advertisement.









