‘Prolonged TV viewing was associated with increased risk of type 2 diabetes, cardiovascular disease, and all-cause mortality.’ (1)
The studies are very clear when it comes to regular prolonged TV viewing (also on devices), they make us sick and fat. If you feel this to be a problem then try this challenge to eat as many meal as possible without distractions.
(1) Grøntved A, Hu FB. Television viewing and risk of type 2 diabetes, cardiovascular disease, and all-cause mortality: a meta-analysis. JAMA. 2011;305(23):2448–2455. doi:10.1001/jama.2011.812