Some of the key areas
Business card reading will help create lead/contact in CRM directly
Invoice/Order data extraction will help import details directly for processing with minimal intervention
Claim/expense receipts: avoid hassle of manually entering the details e.g. medical bills, taxi claims, trip fare etc.
Vehicle plate reading beneficial for tracking and monitoring purpose, alert/notify when a vehicle is parked in authorised area
Has ability to extend to any type of document