I remember reading that sometimes exercise extends your life for the same period as doing the exercise. So in a sense yes, you could live longer but at the same time it's not really anymore time especially if you don't like exercising. So if playing Pokemon Go is fun and enjoyable for you and it extends your life by the same amount, that's pretty much a win win in my book. Note, I'm not a Pokemon Go player myself (don't want a dataplan on my cellphone) but I don't find Pokemon Go players on average annoying, just amusing. If it makes you happy and you live longer, that can't be a bad thing right?