The ADA prohibits discrimination on the basis of disability and says that places of public accommodation (including private commercial enterprises) need to make accommodations for the disabled (42 U.S.C. § 12182). Importantly, a place of public accommodation, per 42 U.S.C. § 12181(7), amounts to a privately operated facility whose operations affect commerce. However, since the ADA came pre Internet era, the ADA didn’t contemplate or mention websites or apps.
There have been some notable cases regarding the ADA. For example, two major hotel room marketers (Expedia.com and Hotels.com) with their business presence on the Internet were sued because its customers with disabilities could not reserve hotel rooms, through their websites without substantial extra efforts that persons without disabilities were not required to perform. These represent a major potential expansion of the ADA in that this, and other similar suits (known as "bricks vs. clicks"), seeks to expand the ADA's authority to cyberspace, where entities may not have actual physical facilities that are required to comply.
I know there may have been concerns that the ADA may be too vague or too costly, or may lead endlessly to litigation. But I want to reassure you right now that my administration and the United States Congress have carefully crafted this Act. We've all been determined to ensure that it gives flexibility, particularly in terms of the timetable of implementation; and we've been committed to containing the costs that may be incurred.... Let the shameful wall of exclusion finally come tumbling down.