Laggy over wifi would actually be a good thing. And you'd need two damn there flawless connections to do that. Have you ever used gaikai or onlive to stream games before? Those are laggy playing older games and that's a best case scenario using just your home connection.
at home though, you're not using an internet connection. just your local home network/intranet.
like Smooth said, outside of home and using internet is gonna be interesting.