Does eye contact with the cooking food make it more delicious?
I can think of two potential things that might affect how delicious food is:

If you're the one cooking, constantly watching the food makes sure you don't burn it or do something else that might adversely affect it.

For everyone involved, cooking or not, it can help to build anticipation.  You'll smell the food cooking, and may trigger physiological changes (stomach rumbling, anticipatory salivation, etc.) as your body prepares for food.


As your body has an opportunity to start thinking about the food and there's a period of denial (as the food hasn't been served yet), the food may seem more delicious than food that's only set down before you just as you're preparing to eat.  (Although, if the food quality is lacking and doesn't match what you've been anticipating, it's possible that your enjoyment would be worse)
To know if it's truly eyesight that's required, you would probably have to do some experiments -- watching someone cook behind a glass window or via closed circuit TV so you can't smell it being cooked; being blindfolded so you're in the same place to get the smells but can't actually see the food being cooked, etc.