With all of the hype and industry demand around smartphones, regular cell phones have kind of hit a plateau and many cell phone manufacturers have taken attention away from advancing regular cell phones, and instead are focused on growing their smartphone offerings. Thus, many regular cell phones remain "basic" when it comes to multimedia capabilities.
Smartphones have the latest music playback software and video viewing software built-in. For example, Apple's iPhone has a built-in, mobile version of iTunes and many Android based smartphones offer a comparable music playback app. Video and movie viewing on most smartphones is good, because many smartphones offer wide, high contrast screens.
Most regular cell phones have very generic multimedia capabilities. For example, nearly all Verizon "non-smart" phones feature the same basic music player, and very limited video capabilities.
As far as pictures are concerned, a regular cell phone may have a 2 megapixel camera, where a smartphone may have an 8 megapixel camera with advanced digital zoom and flash. Not only that, but many high end smartphones have built in photo editing software. Not only do the latest smartphones allow you to take pictures and record video, but they also have built-in editing software, allowing you to crop, modify, and edit clips and photos directly on the phone. Most normal cell phones can only take pictures.