We get it. That black bar. Why would they do the black logo bar?
But the fact there is, that bezel "area"? It's likely necessary and not decorative at all. And the reason for that? Boomsound.
There is a reason that the first One was physically taller than say the 4.7" Moto X or the 4.8" Galaxy S3 and similar devices.
Boomsound isn't just a powerful speaker. It also had larger dedicated chambers to enable those speakers to put out richer sound. Same as the subwoofer dilemma: High Efficiency, Low Bass, Small Enclosure: you can only pick two.
Actually if you look at the first HTC One teardown, you can see the chambers at about 8:30 in this video:HTC One Disassembly Tear Down Repair
For a mobile device, that is quite large. Given that their teaser video was promising 70% more....something (output? Power amplification? Bass extension? We'll find out in march I suppose), there is a good chance the chambers could be as large or larger to enable that.
The point is that this is a space on the phone where antennas, display hardware connections and other components generally go. So when you add acoustic chambers such as this, that "ugly black logo bar" is very likely the area of the device where this hardware is located at due to the existence of said acoustic chambers. Just something to consider.