Don't even bother - it will update automatically when they push it.
The email said that they will deploy it by May 20th. I think it's going to be very close to that date, not too much sooner. Which is probably good. If they pushed it too soon and had too many bugs then everyone would be complaining to have the old one back.
Wait another month, then re-ask your question. Also I wonder how it will look in Canada since the on-screen advertisements are all for US services (i.e. hulu+) and the search is also across those services. Did they ever even actually say non-US markets would even get the update?