Ob-ses-sion [noun] the domination of one's thoughts or feelings by a persistent idea, image, desire, etc.

I have decided to write my article based around the way that technology has come to dominate almost every aspect of our lives in the current day and age we are living in. I chose this subject not only because of my personal obsession but because of the bigger picture in which people are globally obsessed with having the latest tech and how our obsession with technology has changed aspects of our lives.