Everything related to movement will send unreliable packets, everything else then tcp or reliable udp?
If yes, will it be in near future?[/QUOTE]
There is no UDP in websockets, there's only TCP. This can work for some games, but not good if quick and reliable response times are needed. UDP is possible using WebRTC, which is only supported in Chrome and Firefox (and Webkit GTK+ will support it soon as well, if not already). For very large multiplayer games, you may want to check if the Photon HTML5 client supports WebRTC and not just Websockets.