Here’s an idea of using Deepstream or pusher to subscribe and receive messages from users. There are tons of possibilities like
Colleges can take benefit by displaying valuable messages which comes from their students. It really helps the students to anonymously post messages.
Voting time, we all know how these displays could be useful. We can either go by various parties or if you intent to showcase public voice as a message, that would be awesome!
Ads by people’s interest. You can let folks to come up with categories of things they like and a system can be developed to fetch Ads and display them. The same idea can be used by shop owners to show relevant Ads.
In Summary, there’s a huge market space if you correctly utilize these ideas and push to market.