I think that the jailbreak community has already excelled itself in terms of the quality and sheer tenacity of the tweaks we've seen since Pangu8 was rolled out last month, and with seemingly no end to how iOS can be manipulated, one ambitious developer has begun a project to port the external CarPlay software onto iPhones and iPads. Essentially, instead of using a standard infotainment system, a user would feasibly be able to mount their iOS device and use that as the complete in-auto CarPlay system, and although it's quite buggy and not yet ready for prime time, it's very promising indeed.