I have noticed that many sites now come with a left panel, for example:
This might be one of the announcement posts on
I see a very good rationale for this opened space on the left: to add advertisements.
Because I use AdBlockPlus I may not get the normal view of the other sites. So far it seems tex.stackexchange has not changed its design. Is it coming to us? If yes will it be possible to disable it entirely?
This link seems to be the main one for discussion on meta site.