I wouldn't go that far, I'm sure it can be useful for some people, but mandatory? I can't see a single occasion where this would have been helpful to me personally. So i could take it or leave it. Far from mandatory.
Anyways there is an APK called OCR2 in the giant list that leaked prior to the keynote. If this list is accurate then it looks like it will be included. Granted im assuming thats what OCR2 is, i could be wrong.
http://rootzwiki.com/news/wp-content/uploads/2013/09/BTM7kOWCMAEkBGF.png
it is my buddy mandatory , but if you are like me living in a foreign country and translating printed texts on the go is your dream

.. but i can't find this OCR2.apk in this list
another thing i found in the samsung galaxy s4 specs on the samsung site it is mentioned that it has optical reader while on the note 3 nothing is mentioned
but what gave me hope again that this list contains trip advisor which is also mentioned in the S4 specs but not in the note 3
S4 :
Additional Features
Group Play: Share Music, Share Picture, Share Document,
Play Games
Story Album, S Translator, Optical Reader
Samsung Smart Scroll, Samsung Smart Pause, Air Gesture,
Air View
Samsung Hub, ChatON (Voice/Video Call, Share screen,
3-way calling) Samsung WatchON
S Travel (Trip Advisor), S Voice? Drive, S Health
Samsung Adapt Display, Samsung Adapt Sound, Auto adjust touch sensitivity (Glove friendly)
Safety Assistance, Samsung Link, Screen Mirroring
Samsung KNOX (B2B only)
Note 3 :
Group Play : Share Music, Share Picture, Share Video, Share Document, Play Games
Story Album, S Translator
Samsung Smart Scroll, Samsung Smart Pause, Air Gesture, Air View
Samsung Apps, Samsung Hub, ChatON (Voice/Video Call, Share screen, 3-way calling),
Samsung WatchON
S Voice? Hands Free, S Health
Samsung Adapt Display, Samsung Adapt Sound Auto adjust touch sensitivity (Glove friendly)
Samsung Link, Screen Mirroring
Safety Assistance, Samsung KNOX