Japanese Professor Invents 'Lickable TV Screen'
What is this called? (the flat vertical surface in a television set on which pictures are shown.)
This is called a TV screen.
What are these called? (the distinctive taste of a food or drink.)
These are called flavors (US) /flavours (UK)
What is his job? (a person who is trained and knowledgeable wine professional, normally working in fine restaurants, who specializes in all aspects of wine service as well as wine and food pairing. )
He is a sommelier.