Seamless user interaction involves developing new modalities like vision, speech, haptics and bio-signals to create multimodal content and increase interactivity beyond what is possible today. While computing power has increased exponentially per Moore's Law, user interaction speed has not kept the same pace and remains a bottleneck. However, within the next 20-30 years, direct brain interfaces could resolve this issue by allowing implicit, multimodal interaction that approaches a singularity with computing systems.

1. Seamless user interaction TouradjEbrahimi Touradj.Ebrahimi@epfl.ch WIAMIS Panel Multimedia & User Interaction

2. Multimedia Multimedia = Multimodal content + Interactivity User interaction Interface 2

3. Moore’s law of user interaction ? User interaction’s speed has not followed Moore’s law (yet) 3

4. New modalities in user interaction Vision Speech Haptics Bio-signals (EEG, …) … Multimodal 4

5. New protocols in user interaction Explicit Implicit 5

6. Singularity is near! In 20-30 years, direct interface to brain will resolve the current bottle-neck in user interaction 6