White Dwarf 21 mentions that Armies on Parade is indeed happening this year. There had been lots of questions and rumors based off of nothing being mentioned by Games Workshop about the event earlier this year. Its a good event to keep going, as you can see from one of the winners from 2012 in the pic above.
There is always some amazing done for Armies on Parade, which is apparently happening in September, and if the information I have is correct it will be on Sunday September 28th at your local Games Workshop stores.
Armies on Parade is a competition where hobbyists from all around the world paint up a 2x2 board, cover it in terrain, and then top it off with a fully painted army.
via Dan from Forged at the Painting Desk
No one seems to have commented on this yet but I've just finished reading WD 21 and on the last page (32 with the WD team's models) they talk about this years armies on parade promising to talk more about it in issue 22.
So looks like against all silence that's been implying it's canned this year Armies on parade is in fact going ahead.