While the myTouch 3G is just now receiving Froyo, a ROM for the yet-to-be-announced myTouch 4G leaked out today, and the diligent folks over at Android Central have been pulling it apart in search of any nuggets of joy.

And what nugget could spread joy further than a promo video?

The promo video, embedded below, shows off the Genius button, HD video recording, Video Chat, and ScreenShare (sending videos to a DLNA TV) in the context of an overly-enthusiastic nuclear family.

Of course, details on the handset aren’t in great abundance, but you can expect the new myTouch to feature T-mobile’s “4G-like” HSDPA+ speeds, and not actual 4G voodoo.

The handset will be available in your choice of white, black, plum, or red, and should ship in time for the holidays.

As usual, we’ll keep you posted on any more details (such as price) as they arrive.

[via Phone Arena]