As you can see at the end, you can actually see the names of the people playing online! So this won't be like SSBB where you can only see a friends name, here you can see anybodies name! If it'll run anything like in the video, it will be absolutely amazing. You don't often see a game with 32 players online on a game console!
We can jump into a game right away, and presumably there will be score charts showing deaths/kills (otherwise it would be sort of pointless). Also, we get to choose the kind of game we want to join (at least if it's a normal game or a Zapper game) and here's hoping we can host our own games! (To play with friends)