How does the modern concept of User Experience (UX) differ fundamentally from classical HCI?

Answer

HCI historically focused on interaction mechanics and task performance; UX encompasses the entire user experience, including emotional response and context.

Classical HCI concentrated on input/output mechanics, usability, and performance for specific tasks, while UX broadened this scope to include the user's entire experience, including emotional response, branding, and context.

How does the modern concept of User Experience (UX) differ fundamentally from classical HCI?
inventorhumancomputerinteraction