Features, whether useful or not, add to the cost of software at all stages, from programming through training to management. Increased accessibility will, of course, mean that it's easier for you to hire workers with special needs. In this day of staff shortages, that's not a minor consideration. In addition, accessibility features make products easier to use for all users. Design features that make people's tools easier to use are good for everyone.
Work becomes less stressful and less likely to injure.
Tasks become easier to perform. Web sites become easier to access and navigate. And you can hire people you couldn't hire before. While these new tools will make it easier to use the equipment and software that's required to run today's businesses, they won't necessarily make the experience any easier. E-business will still be slowed down by the fact that people remain intimidated by the Internet.