In general, safety is the biggest risk in multitasking, especially while driving. A new generation of young people are growing up with access to portable devices at their fingertips, and their overconfience in manipulating these devices while driving can cause accidents. Driving While Texting is sure to surpass DUIs as a leader in auto fatalities soon enough.
From a focus standpoint, those who multitask can have real focus issues. Multitaskers can often do many things at once, but can they do one thing to its best completion? I doubt it. Therefore, specialization and self-sufficiency are sacrificed. Gone are the days of the lone "carpenter" and model-specific "mechanic"; today, there are only "general contractors" and "automotive technicians," all of whom must have a wide skill-set in order to keep employment.
From a health focus, multitasking can lead one to neglect diet and mental health. If one is always "on," then there is no down time for decompression, and stress (hypertension) is sure to follow. A face- paced lifestyle will inevitably lead to a fast-food diet. Sleep patterns are sure to alter, causing unforseen problems later in life.
Multitasking can bring wealth, but it can also be costly. Many multitaskers must "keep up with the Joneses," in terms of time "on" and in equipment. The latest gadgetry can put a strain on one's pocketbook and may only compound addiction to technology.