We do p2p communications. A big issue is network interruption. Somebody walks around with a laptop or mobile device, roams, link broken and a gap in your experience as it scrambles to reroute. Or somebody else in the house starts to use the network, and your negotiated link drops available bandwidth/congests.

If its free or just for fun, then yes you can go this route. But people paying for an experience are, in our experience, intolerant of any interrupt or quality drop.