From my experience YC is sort of like the state of Missouri. Show me don't tell me. The ideas on this list might not be pie in the sky, but they are most like

From my experience YC is sort of like the state of Missouri. Show me don't tell me. The ideas on this list might not be pie in the sky, but they are most likely something people can get their head around, and are fairly polished. This makes sense as the next step for many of these teams is going to be to try to raise capital. The more pie in the sky, the harder it is to get buy in from an investor, unless you have the goods. In three months I'd bet these groups have something pretty nice to show for their time spent in YC and inching toward an even larger goal that might not be evident from their 3 line description.