As stated... This is only useful for businesses using office 360. Getting your friends to use skype is as easy getting them to switch to windows phone. I used to have skype to speak with friends abroad, but most have switched to Whatsapp... I now use whatsapp.
This is also a Web-based Skype for Business (nee Lync) mini-client, not to be confused with desktop Skype (Consumer) clients (which has its own conferencing system which is also different and with different limitations). One of the cases where Skype and Skype for Business branding is unnecessarily confusing.
It does seem to be a small concession to teams currently using Google's Hangouts in the hopes of upselling those teams to try the rest of Office 365.