Is Skype going to stay free?

Do you think that there is a bright future when everybody is on Skype and calls are free for all?

Not really. Currently Skype is making money by connecting people to non-skype numbers. Imagine what happens when everybody is on Skype? Skype will loose important revenue stream. Is this going to happen? We can reasonably expect, that as more and more people will be joining Skype, it will introduce a subscription fee, which it can keep at comfortable $3-5/month.

The only balancing factor I see - are other SIP, VOIP, etc. providers, mainly gizmo, microsoft and google. If MS or Google will keep offering free VOIP long enough, it may keep Skype at (e)bay.