A new study from NPD DisplaySeach reveals that the average display size on most electronic devices is on the rise. Desktop monitors, television sets, portable media players and even public displays have all experienced a healthy gain over the past few years and are projected to increase through next year. There are, however, a few exceptions to the trend.

Most gains are modest at best, like the five percent increase in the average desktop monitor from 2010 through 2013, the seven percent jump in portable navigation devices and the nine percent increase in the average size of an LCD TV.

Other categories saw more impressive gains. For example, the average size of a portable media player shot up 29 percent while mobile phone screen size increased by 38 percent on average. OLED television size is expected to jump a whopping 267 percent come next year. This is due to the fact that the average size of an OLED TV in 2010 was only 15 inches. We are now seeing OLED televisions average 55 inches in diagonal size.

The Mobile PC category is the only application that is on a downward trend. NPD believes that notebook computer buyers are after more portable solutions like Ultrabooks. Furthermore, tablet screen sizes started out around 10 inches but here lately we've seen a trend towards smaller slates.

Amazon's Kindle Fire, Google's Nexus 7 and Barnes & Noble's Nook Tablet are all prime examples in the smaller market. With Apple planning to announce the iPad Mini at a media event next week, the move towards smaller and more portable tablets is only going to pick up steam.