On the contrary, I like both as PMPs, and will probably ask for a Zune HD this holiday season.
It's just that I think the need to criticize the Zune for a lack of apps seems kind of silly considering it's not a mobile phone, like the iPhone (which seems to lend itself more to the app store than the iPod Touch). Really, how many people plan to buy commercial apps for a sole PMP device?
... if we're talking a Zune cell phone, that'd be another matter.