HTC came to the realization after the Nexus One that phones with ample screen space 3.5" and above have no need for a trackball. They do seem to feel that smaller midrange devices could still use one as the render shows an upcoming phone that looks very much like a mini Nexus One. It features a front facing camera and not much else is known at this time.
The next render features a different HTC with a front facing camera and another peculiar addition. It appears to have a trackpad, along with send and end buttons that have returned seeming out of left field.
HTC seems to be coming to the market with a load of different form factors and price ranges. It is nice to see some differentiation in their lineup. However, I still question the point of bringing back the familiar red and green buttons.