Smartphones became so popular it reduced PC sales significantly and continue to do so. Since there is an app for everything, who would need a PC or desktop anymore? At least for most of the people who don't do tech or related jobs.
Due to its popularity, phones got bigger and bigger with some phones there is not much difference between a tablet and a phone.
The trend is changing and we're now seeing a rise in small or cute phones & this .net TLD with exact terms cute and phones may help catch that trend for a blog, e-commerce or related site.