As this question is worded, absolutely not. If every upcoming game releases on all 3 'next gen' consoles, then nothing is exclusive. I buy systems for exclusives. Even if each game wasn't running on all 3, but had a release on our current gen stuff as well as the new machines, it's still not exclusive!
I've used the same system for adding new consoles for years. It's all about the games. For me, a must-have is something:
-that is completely exclusive to its console, or features notable content exclusive to this console (see Eternal Sontata as an example.)
-is released on physical media.
-is something I find highly desireable.
If a game is digital only, or if I just feel like it, it can get dubbed as a 'high-want' (one step lower than a 'must-have'). A must-have is worth 1, a high-want is worth 1/2. I won't buy a console unless there's at least 1 must-have, AND I can reach a total of 3 with other games. So, 3 must-haves, or 1 must-have & 4 high-wants, or some other mix. Also, no buying on credit- if I couldn't buy in cash, I don't buy.
I know it sounds weird as hell, it's just the easiest way to quantify the mental jumping jacks I do to avoid buying a console for one title. After all, a console is several hundred dollars worth of investment, I don't want to be frivolous about that! I already have consoles. I already have games. I technically don't need more, so I need some good reasons drop that kind of money.