I read the same article when it released and you're right. Initially it was somewhat discouraging when they talked about nobody else should enter in the premium WP market, but I completely agree with what you said:

"That might be true, but don’t let those words discourage you. There is always room for someone who does themes better whether it be design, user interface, or functionality."

While it is difficult, everything takes time and hard work. This goes for anything.

Good job with what you're doing here btw.