For now...
Yes, for now the app requires people to press buttons with their fingers; apparently there is a "stealth mode" that they can enable if they know where the buttons are to turn off the screen so it's less obvious that they are using it.
However, the publicity on this thing is going to bring about much, much, much more superior applications.
For example, it would be very simple on the iPhone or any similarly-equipped cellphone platform to write a card counting app that employs a bluetooth (wireless) microphone and headset. While it could be used with the cheap $40 models you can buy at radio shack, this would be obvious and easy to ban from the tables. However, there are also very tiny bluetooth mics and headsets that can be mounted inside the mouth and inside the ear.
With a simple voice recognition algorithm, the player merely needs to subvocalize the cards as they come out of the shoe, and the application would tell him what to do and how much to bet for each play.
This is all possible with tech out there today. If I were an idiot or greedy, I could write it myself, probably inside of a week.
The publicity that's been generated as a result of this barely-useable app is simply going to cause others to generate much more difficult-to-detect apps, which WILL cause search & seizure to become a likelihood at the tables. As if the casinos need any more excuses to abuse their power.
Oh well.
-BB