The use of bitcoin again primarily comes in gambling and trading. So it's mostly the speculation markets. This may change and more merchants may accept it in future.
If common establishments like Starbucks or other coffee shops, and known supermarkets will accept bitcoin, I think that is already good application for bitcoin. Because coffee shops and supermarkets are already part of daily life of most people, it would be easier for them to pay bitcoin if it is available as payment method. However, most of us are still treating bitcoin as investment, in which, someday we are hoping that it will increase its value. And so as much as possible, we don't want to spend our bitcoin.