We have a bit of interesting info here, from reddit user Mr_Bartek. It appears that HTC is not content with Android Auto and has decided to create their own vision of what Android Auto should be. The device is known as the HTC Cello. According to this reddit post, it appears that the HTC Cello will do a whole lot more than what Android Auto currently does.
"...HTC is planning to integrate more with the car than Android Auto does as the device uses CAN bus and RS485 for communication with the vehicle and bluetooth, MHL for communication with an Android device. As of right now the device is tested with the following equipment: Night Vision, Sonar, Mini HMI (Human Machine Interface), DVD, Tyre Pressure Monitoring System, Lane Departure Warning System, Navigation and GPS. Device currently runs on KitKat with Sense version specifically made for cars called Sense Automotive (may be an internal name)."
Pretty interesting product here from HTC, but not too surprising. We've heard that HTC is experimenting with other product categories, with the RE Camera, and VIVE being some of those new product categories. And it looks like now they are getting into the car scene. However this will likely mean that the other Android OEMs are looking to get into their own Android Auto-like product. Which in turn means that we could see a whole bunch of variants for those with Android phones. This could be a good thing as it'll allow for more competition, but it will also confuse a lot of people. Hopefully, HTC will allow Cello to work with all Android devices and not just HTC smartphones and tablets.
The HTC Cello is running KitKat and has been in development since Q4 2014. Hopefully it'll be running Android 5.0 Lollipop by the time it's announced. The reddit user does say that he doesn't have a whole lot of info on the device. And it sounds like it's still a ways off from being an official product from HTC. We'll be keeping an eye on HTC Cello to see what the Taiwanese manufacturer does with the device or product.