This is a great concept as virtual business cards are the high tech eco friendly option to paper business cards as using paper is not very eco friendly as trees are cut down to make paper. Moreover the business individuals do not need to carry a stack of paper business cards in their pockets or wallets anymore. Also one will never run out of these types of business cards.
Everything we do in business today is digital -- sending mail, signing contracts, attending meetings, even networking. The business card is one thing that digital will not fully replace anytime soon.
A business card is a physical object that a potential prospect leaves the encounter with. Your brand stays with them. If you meet a prospect and exchange email addresses and phone numbers you each walk away with another contact on your mobile phone -- it ends there. If you hand over a creative business card that makes a great impression that person is likely to show it to other people -- putting you and your brand in front of additional prospects.
Most business cards are paper, although there are lots of other options, from plastic and wood to metal and slate. Assuming you go with paper, you need to choose thickness, coating, color and weight. All of these can affect the price.