"What do you think?"
Who cares what I think. The odds I can pick out a winner business or app from what you just described is close to 0. You think I would have said "yeah an app that makes fart noises is going to sell real well".
Ignore what everyone else says. Use it maybe as some feedback that you might not be explaining how awesome whatever you are making is, and you need to teach them better.
Echoing Tim in this thread, look inside yourself. Would you pay for what you are making? Do you want or need a solution to whatever problem you have so bad, that you'd be willing to use a completely terrible solution to your problem. For example, could you cobble some stuff together to give you a crappy version of your idea. Could you basically code up a version of this idea just for you so you could see "your favorite friends from Twitter and Facebook and displays the updates from those friends in one view". Forget about the animation. Forget about even the picking friends part, hard code those friends in. Make a web app that runs in the web browser that has the friends hard coded in and does the status updates in this single view. But don't spend much time on that single view. Just get it done.
Now, use that for a couple weeks. After a bit you should have a good feeling of whether or not you love this crappy prototype. If you keep going back to it because it's so useful, than you have something great on your hands you should go back and complete.
But until then, figure out what you can do today to solve your problem. The crappiest, quickest, dirtiest way to meet the need you have. Everyone is sweating this product + market fit stuff. Forget the market. Figure out the product + you fit. You aren't so much different than thousands of other people out there. If you find you want to use you're own product constantly, you'll have something awesome. Then start worrying about making other people awesome.
