Theming: What it Means Now & What it Could Mean Later

Thread Title:
What exactly does "Theme" mean to google?
Thread Description:

SEOChat member nagual brings up the ever popular speculative discussion on theming. Like almost all such threads this one is mostly speculation and wishful thinking masquerading as fact but there are some sensible thoughts and comments in there to. Although much of it's pure speculative chit chat it's a good thread nonetheless, this post from larrysart made me smile in particular..

Does anyone here actually know that any major search engine has the capability to theme anything at all.

Theming has always sounded a little futuristic to me. The remarks on this thread sounds like theming is a rumor that got started, and has taken on a life of its own.