Oy Vey! Nouning seems to elicit a knee jerk negative reaction in me, but I suppose it shouldn't. The times they are achangin' and always have been and different doesn't necessarily mean bad, although I reserve the right to find the nouning of verbs irritating – humbug! #@*%^<2014 “The results support a concept known as inflationary Big Bang theory, and they can be further analyzed to reconstruct how the Big Bang blew up 13.8 billion years ago. Even in advance of Monday's public reveal, physicists were gushing over the implications.”—NBC News, 17 March>
RANDOM HOUSE WEBSTER’S UNABRIDGED DICTIONARY
REVEAL noun: An act or instance of revealing; revelation; disclosure.
So who needs reveal when we’ve got ‘revelation’? But I suppose one can’t have too many synonyms and this one might make for a catchy topic in a PowerPoint marketing presentation on effective sales strategies – ‘The Reveal’ (>:)
Random House didn’t provide any background on the word, but old faithful did:
OXFORD ENGLISH DICTIONARY
REVEAL noun [from the verb]
1)  An act of revealing something; a revelation; a disclosure; an unveiling . rare after 17th century.
2)  Broadcasting and Advertising. A final revelation of something previously kept from an audience, a participant in a programme, etc. Frequently with the.
Aha! Hawkers – I knew it. So, at the end of the day, your takeaway should be an appreciation of the importance of a good reveal.
The following quotes are from the Oxford English Dictionary and archived sources:
______________________<1952 “This is the process we call ‘the reveal’—the point, toward the end of each candid portrait, where we reveal to the subject what we've been doing.”—Eavesdropper at Large by A. Funt, iii. page 41> [[Some of us may remember Allen Funt as being the creator and host of the TV show Candid Camera (see 1975 quote below)]]
<1975 “But now the final coup, Allen's trademark—the ‘reveal.’ ‘Madame, did you know that at this moment you are on nationwide TV?’”—New York Times, 21 March, page 52/3>
<1991 “Is this for a theme park? A pub? A cocktail? A club? Search me. It's obviously a teaser campaign and the reveal's been lost in the post.”—Campaign, 16 August, page 17>
<2005 “After a barrage of commercials, we are presented with what the show describes as ‘the reveal,’ the first view of her face.”—Class-Passing by G. A. Foster, vi. page 113>
<2008 “Reveal, the verb, gets nouned as ‘the reveal,’ auto industry parlance for the annual unveiling of new car models in Detroit.”—Christian Science Monitor, 22 February>
<2011 “Disney hopes its ‘When are you going to tell them’ multimedia campaign, which features children's reactions after being informed of a Disney visit, will encourage parents to make the ‘reveal’ part of the overall experience.”—Marketing Week, 10 February>
<2014 “Nevertheless, on certain conditions, such as writing down business information or inputting personal account number and password into an ATM machine, the characteristics of wide viewing angles of the display apparatus may cause the reveal of users' personal information.”—Politics & Government Week, 6 March>
Ken G – March 18, 2014