There are some platforms which are "suitable" for games for kids and families (Nintendo home consoles) and other ones that "work better" for hardgamers or adult people like racing simulators, FPS, etc. (PS4/XBOX).
Technically all consoles can run all categories of games, it's just a matter of perception from the audience which think that Sony&Microsoft have serious games and Nintendo is for children/families.
If you are thinking about a game design you have to choose the target platform(s) as well, taking into account the potential sales you would generate on that platform.
If you want to follow the common rule of choosing the "most suitable" platform for your game , though, you will likely face more competition.
More gamers which like your type of game, but more competitor developers.
Conversely, if you are the only one going to ship a Tekken or Gran Turismo - like game on the WiiU... you have to ask yourself if there are enough children who like it.
And if the game has even little violence in it, children may like it but some family association probably will throw a monkey wrench in your works if the game is for WiiU but it won't if it is for PS4! That's strange uh? It happened in the past to Carmageddon 64 for N64, they had to change the blood color in that version of the game, but not on PC/PSX...
So what is the right choice, face the competition and possibly the saturation, or be the only one with that genre for that platform?
I remember World Driver Championship for N64 , it was the *only* decent GT game on the 64 and had very good sales for that reason... can't tell if the developer broke even at least though.... there is a reason why nobody else took that risk