Don:

1. There are no iPad clones. You are probably referring to tablets. There are generally a boatload of Android OS tablets, of varying degrees of usefulness, Microsoft branded Surface machines, and tablet PCs from various manufacturers. The latter two will not be $120.

2. Someone suggested Google Chromecast - this is an honest to God good solution involving no cables and a $35 outlay. However, it does require working wifi. If your big screen has an HDMI port, the Chromecast doodad goes onto the HDMI port, the other part is your PC or laptop, or iPad or iPhone or Android 2.3 or higher device - running Chrome as a browser on the PC/laptop, (not sure how it works with iOS devices).

If Streetjelly works in Chrome, you can broadcast it to the little Chromecast dongle. We are using Chromecast in our production lab with wall-mounted LCD TVs and a remotely located lappy casting live production numbers.