The increase in the number of devices that can access internet, like digital assistants and phones will require the possibility to access the web regardless the type of the device or the location. The problems of accessibility of the internet resource and the possibility of use by persons with disabilities are also an important characteristic that has to be met in the use of the new technologies.
You can start to learn about the creation of universally accessible web pages, from the Web Accessibility Initiative of the World Wide Web
The Web Accessibility Initiative (WAI) is an initiative set-out by the World Wide Web Consortium (W3C) to develop strategies, guidelines, and resources to help make the Web accessible to people with disabilities.
Web accessibility means that visitors with disabilities can still access the web. This includes navigating, understanding, and interpreting the information available. Ensuring website are accessible to all is vital as around 10% of people in the UK have some sort of disability.
Web Content Accessibility Guidelines (WCAG)
The WCAG explain
When developing web sites, making them as accessible as possible is crucial, both to people with different kinds of disabilities as well as to all kinds of different devices, web browsers and screen readers etc.
Why? Out of respect for the user, while making the web site available to as many users as possible.
You need to be aware of the fact that the web site will not look the same to all visitors, not all UAs handle CSS and other things. The solution isn’t to code in HTML 3.2 and avoid using CSS and JavaScript, since that’s just plain dumb.
RSS/XML