This chapter presents an overview of the latest developments in sensor technologies and discusses issues, challenges, and potentials that sensors present for eAccessibility technologies. Going a step further, it also presents the challenges and potential that network technologies bring in combination with sensors. Given the developments in sensors and networks, it then proceeds to present the developments in the level of cloud technologies and semantics and how all these connected together are now starting to form what we today call the Internet and Web of Things. Starting from the low level of sensors, this chapter aims to zoom out to the bigger picture of Web of Things, Big Data, and Semantic technologies in order to help the reader understand the interconnection in the technologies and the potentials that all of them together present for the future.