What will happen to Bitcoins, or more specific, to the price of a Bitcoin, once all 21 million are created?

(1) At the moment we all talk about miners, GPUs, ASCIS, bulletin boards are filled with discussions. But once no new BTC are mined, will the price drop to 0? Because no one cares about BTC any more?

(2) BTC is meant to be a currency, right? But can I buy beer with it? Or a notebook? Book a flight? It seems all people do at the moment is trade it on MtGox, etc. - but they don't buy goods. No?