Well more than half of the General public doesn't!

If you read the write up:

http://bitforum.info/t/do-you-know-what-bitcoin-is-more-than-half-of-the-general-public-dont/224?u=angelo

WTF? How come bitcoin is still unknown to the common people?
Start ups after start ups have managed to raise millions and millions in funding but more than 50% of the common people doesnt know about it?

What do you think is lacking? What are bitcoin's shortcomings?