The point is that WTP and WML are optimized for their operating environments, have very wide industry support and are relatively cheap to implement in mobile devices. And all this time, the WAP Forum will be working to add new functionality that reflects the changes in the underlying technology, and develops capabilities that meet the special needs of mobile devices. As time goes on, client devices will not just be restricted to PCs and mobile phones. There will be very many different devices using the Web for wide-area networking. Currently, this adds up to a headache for content providers who have to decide where to commit their scarce development resources and where to target their user base.
Users too expect wide availability of web services.
The WAP Forum, digital television industries and W3C recognize this, and are addressing the problem of differing client capabilities through convergence. The next key focus for WAP is universal accessibility. Web content today is aimed at the de facto standard of a desktop PC with an HTML browser. WML and i-mode browsers on mobile phones are the first of new class of web clients, each with differing capabilities. The goal of universal accessibility is to ensure access to applications and services, with proper rendering of the content regardless of client capabilities.