Touch screen cast would be awesome too. I’d love for there to either be that or an open android auto/car play standard. The former would probably be easier and I imagine some aftermarket head units have that functionality already.
I’ve actually wanted to DIY a head unit at some point and getting a good satnav experience on it would be key to it being a daily DRIVER.
Three pillows. One thicker one leaned up against the headboard at a very slight angle, almost vertical. Then two thinner pillows, first one at what would be a 45 degree angle overlapping the thick pillow, then the final one overlapping that one.
Only way I have been able to find comfort in pillows in the last 5 years or so