It's called living in the 21st century, and it effects a lot of kids these days. It is a societal problem more than a person specific problem, because our entire society is built on instant gratification and if you don't get what you want out of it then you get bored with it. That is just my opinion though.
Nice answer man havent thought of it that way before..
Anyways yeah i find i have this feeling too and its affected my growing addiction on buying new things all the time. I'm not sure how to answer this myself but i think it might be some form of depression in a way like you said yourself.
Heres something i found to hope it helps.
Common adult ADD / ADHD symptoms: Trouble concentrating and staying focused
Adults with ADD/ADHD often have difficulty staying focused and attending to daily, mundane tasks. For example, you may be easily distracted by irrelevant sights and sounds, quickly bounce from one activity to another, or become bored quickly. Symptoms in this category are sometimes overlooked because they are less outwardly disruptive than the ADD/ADHD symptoms of hyperactivity and impulsivity—but they can be every bit as troublesome. The symptoms of inattention and concentration difficulties include:
“zoning out” without realizing it, even in the middle of a conversation.
extreme distractibility; wandering attention makes it hard to stay on track.
difficulty paying attention or focusing, such as when reading or listening to others.
struggling to complete tasks, even ones that seem simple.
tendency to overlook details, leading to errors or incomplete work.
poor listening skills; hard time remembering conversations and following directions.