First of all, when I go to Starbucks in the morning, my phone is charged above 98%. Second, the time spent in Starbucks and the amount of charge you'd get while there would not contribute enough to make it worth while. And last, anyone that can't manage their phone battery enough to need to rely on a gimmick like this needs far more than this to make it through the day.
I think you are thinking that all people who are unlike you are somehow lesser. There are people who go to starbucks and sit for a few hours. It will be nice for them, since there are people who run their entire business on their phones. It's just nice to them there. And it's great marketing for the wireless charger company. I think it's a great idea.