Pretty impressive. IdTechEx predicts that the current $5 billion annual market for 3D printed electronics will grow to over $35 billion by 2020. They also predict, which is not shown in this graph, that by 2030 things will explode to $300 billion. OLEDs are the number one item to be printed, but later on solar panels will begin picking up steam.

I find it interesting that a couple weeks ago Gartner released a study also showing general 3D printing to grow steadily until 2024, and then explode with growth there after. Seems like most analysts feel that the 2020-2024 period will be when 3D printing hit's its stride of exponential growth.