-I can download my keys from a site such as blockchain.info as a pdf file with a fancy scanner code.Basically,print the same which will provide almost similar functionalites.Agree,you've better security.
That's completely different. That would be a backup of your keys. You can't pay with it because you can't prove you don't have another copy. The recipient simply won't believe you. With Bitnotes the recipient can be sure you cannot defraud him.
That's the main point of your security model.
Price will definitely be lower than existing physical bitcoin solutions. If you want to get a free sample and review it as a developer, you will be able to apply. We will launch an application form soon.
Thanks for the feedback so far. Any security remarks? Have anyone read the paper?