Pando is one of the newer technologies that I have come across. With this technology, you can have video call participants up on screens that surround the speaker. Along with some fancy production (there's a control room and moderator), Pando has the capability of expanding how online events, like speaking engagements, training, or seminars, can be done.
On the site, you can watch a free demo of the product, which I found entertaining.
Pando™ - Where Virtual Meetings Come Alive
Pando™ Virtual Meetings
View this on pandomeetings.com