I just got email from HTC:
Hi, I am Danielle and I would be happy to assist you today. You were wondering about the cap on 30 FPS on your HTC EVO 4G. Since this Android device employs a unique HDMI output to deliver video in HD quality to an external display, the hardware graphics driver interface uses significant resources for the HDMI output and therefore displays graphics at 30 frames per second on the integrated display. It?s important to keep in mind that content including most movies and television, are created to run at between 24 and 30 frames per second. We have found that some games may be impacted by this limitation. The HTC EVO 4G has been locked to 30 FPS. This should not present a major issue for most Android applications; however, you may have some issues with some 2D or 3D applications. The 30 FPS has been locked to enhance overall performance in the device. By lowering the FPS of the device the CPU works less. This increases the battery life of the device. The 30 FPS is set but we have decided to look into the possibility of overcoming this limitation by software changes. HTC plans to announce its findings when we complete our investigation. I thank you for contacting HTC and please feel free to send another email if you have any other questions
Hi, I am Danielle and I would be happy to assist you today. You were wondering about the cap on 30 FPS on your HTC EVO 4G. Since this Android device employs a unique HDMI output to deliver video in HD quality to an external display, the hardware graphics driver interface uses significant resources for the HDMI output and therefore displays graphics at 30 frames per second on the integrated display. It?s important to keep in mind that content including most movies and television, are created to run at between 24 and 30 frames per second. We have found that some games may be impacted by this limitation. The HTC EVO 4G has been locked to 30 FPS. This should not present a major issue for most Android applications; however, you may have some issues with some 2D or 3D applications. The 30 FPS has been locked to enhance overall performance in the device. By lowering the FPS of the device the CPU works less. This increases the battery life of the device. The 30 FPS is set but we have decided to look into the possibility of overcoming this limitation by software changes. HTC plans to announce its findings when we complete our investigation. I thank you for contacting HTC and please feel free to send another email if you have any other questions