Eventually Sony will take over the USA MP3 player market, just as they recently have in Japan: They are expert in the art of making small, durable, good-quality electronics with many years of proven experience. (If you can find an old Sony Walkman in the garage or attic, I bet it's still working.) If they didn't get off to a bad start with their awful "atrac" proprietary format, they'd already have a much larger market share.
I'm glad to see they're coming out with a 64GB version. I'll be waiting for the 128. I have a 250 GB music collection, and the only options for the past few years have been the iPod Classic and the Zune. Most people I know that are iPod owners are on their third or fourth one. They look at them as disposable devices. The hardware fails and they buy the latest model. That's not the way I consider my electronics that may cost a few hundred dollars. I'd like them to lasts a couple of years or so.
Before you "fall in love" with the Zune HD, I suggest you download the stick-a-fork-in-your-eye Zune software and try managing your music library. The cotton-candy, bloated, software would have fit right in about 1995. It's dreadful. I should know; I'm the suffering owner of a Zune 80, but don't take my word for it, just Google around a bit. The Zunes are locked down, and you can't sync with any other software: including WMP!
I, for one, am glad to see that Sony is finally getting into the large-capacity MP3 player market. It may be just in time, as there are rumors that both MS and Apple could be getting out, which is news that doesn't bother me one bit.