Electronic business card

When I once again ran out of business cards (as always at the most inopportune moment, according to the requirements of the genre), I thought about the endless business card.
Some thoughts and experiences inside ...

What is now ...

There are the usual business cards to which we are all accustomed. Paper (in some cases plastic) rectangle with contact information.
Recently, QR-cards began to appear on business cards, which speed up the processing of business cards, but almost all business cards have the same fate - they all end up in the trash - they are lost, forgotten, thrown away as useless.
The goal of all business cards is one - to quickly exchange a minimum of contact information in order to continue the communication in the future.

Business cards ran out, what's next ...

So, business cards are over, contacts are exchanged on a piece of paper, which is inconvenient to store, difficult to process, it is easy to accidentally lose (since it does not look like an “important document”). But if all the business cards fall into the trash, then why give them away at all? Why waste paper? Why not make an "electronic business card"?
The choice for some reason immediately stopped on RFID-cards, and on the Mifare cards. Although of course not immediately and not for some reason, but there were the following reflections:
1. Convenient data exchange with mobile devices, NFC-enabled phones; in the future, the phone itself can be replaced by the phone itself;
2. The card allows you to store information on the card, not only ID-cards, but also another (Mifare Classic can store 1Kb of information);
3. Traditionally, a business card is a rectangle with contacts, and probably it should remain so for some time, you just need to change a little the way information is exchanged;
4. NFC technology is gaining momentum, and more and more devices are emerging with NFC support;
5. The cost of the Mifare Classic card is low.
So, we get a rectangular map, on which:
1. You can apply visual information, as well as on a traditional business card (including a QR code);
2. Inside the card, you can write down the contact information that will be quickly read and processed by the device, and there is no need to give the card itself;
Of the disadvantages:
While a small spread of devices with NFC.
')

First experiments

By purchasing a Mifare Classic card? very quickly it turned out to write down the necessary information on it (since I had the Arduino + NFC Shield at hand, I did it through it).
Introduced a specific tagging information:

It is possible to protect the card from writing, which will not allow attackers to quickly “spoil” the card.
Mapped the image. The business card is ready.

Immediate plans

Now I am writing an application for Android, which will read information from the card and enter this information into the contacts of the phone.
In the near future plans to make an application under Windows, for easy recording and verification of information from the card.
Think about the exchange of information without a card, just between two phones, while again using NFC to unify the solution.

As a conclusion

What do you think about the idea?
How comfortable will it be?