The Series3 has been around for about 3 months now and among other missing features the Series3 didn't ship with some basicfeatures available on other TiVos including "Recently Deleted" and KidZone.
This means that in order to reach the mass consumers in inland areas, companies need to diversify their product portfolios and design products with fewer fancy features but stronger basic functions.
With the sets of basic specifications and features set in stone, HTC's engineers can then offer the right phone sizes that meet the carriers' requirements, as well as showing a relatively bland rectangular ABS block as an indication on how much space is needed to pack all the components.