Instant transactions notification
With this feature Bytecoin transactions become real-time. When Alice broadcasts her newly created Bytecoin transaction to Bob, his wallet will immediately recognize it and update Bob's balance before the transaction is included in the blockchain. This is achieved through IWallet API interface that subscribes to all the transactions of the node it is connected to and instantly recognizes the transactions sent to you.
Also, am I right to say that the introduction of this new feature means that unlike other cryptocurrencies I would be able to pay for coffee and not to wait until my transaction is completed?
In Bitcoin there are payment services such as Bitpay that take care of your transaction and take extra risks to ensure it's fast. Also I'm not sure this what was originally mentioned by Ullo.
To be honest, I didn't expect this feature to raise questions. Let me clarify a little on instant transactions notification.
We have added this feature so that Bytecoin users get a transparent way to ensure that the transaction has been successfully send. When Alice sends Bob 1 BCN, he will get notified immediately. The transaction is not yet confirmed and not yet included into the block. It shows that Bytecoin network will take care of everything else, and your part as a user is done.
However, there is no guarantee that each and every sent transaction will be included in the blockchain. It has to be chosen by the miner that founds a block, so there's a minor chance that the new transaction will not be confirmed at all. The notification feature is merely for your convenience and does not mean that you've gained the ownership right of the money that is being sent to you yet. It also improves user experience for 3rd party services, as you make the deposit and instantly see that transaction went through to your account but is not yet confirmed.