Could this be the downfall of Skype?

A new web application introduced by T-Mobile enables facebook users to do video/voice calls to each other just by installing the web application which can be obtained from the following link : Bobsled By T-Mobile. What are your views about this ? Do you think this could be Skype’s downfall? Will T-Mobile’s infrastructure be able to handle this? Lockergnome’s article gives a more elaborate view about the topic hereĀ , he even suggests that this might be the eventual death of your mobile phone number….what is YOUR take on that...