Unlike smaller scanners, software interpolation is seldom needed to produce high resolution scans. With A3 scanners the second benefit you're buying is adaptability. The larger scanning area offers great flexibility to graphics professionals. In addition most of the A3 scanners reviewed here either come with, or offer an option for, extras to make scanning more effective. These optional extras include document feed trays, special light blocking covers that hold the scan more effectively or film and transparency holders.
Software is also superior to that bundled with standard consumer scanners.
The bulk of smaller scanners are sold to the general public, who seldom fully explore the capabilities of the hardware and software. Scanners designed for the professional user come with more powerful software and a better selection of bundled programs. The idea of the paperless office has been seriously mooted for years and scanners were to be the conversion mechanism to totally digital communication. Despite initial enthusiasm, the practicalities of such a system make moving to DIP unrealistic for most companies. It requires a stable, high-speed network, customised software and large amounts of storage.