This may be way too difficult, but I have an idea for a tablet/laptop hybrid.
It seems to me that tablets are going to always be lower powered machines primarily for consuming; however, laptops are used for daily work, so you want them as powerful as possible to produce. The requirements of the devices prevent them from being converged. One of the main advantages of having the devices converged is because you never know when you will need some file that is on your laptop while you are on the go.
So my idea is to use the base of a laptop running a full OS (preferable Ubuntu), but a tablet can clip into it as a screen. When the tablet is connected to the base the tablet mounts it as a video out and a storage device, so you can access your files from the laptop, and use the full power of your laptop's CPU (it could even charge the tablet while you are at it). When the tablet is unclipped, the drive is dismounted and the screen is returned to the tablet's control. This way you can still access those files, but within the tablets android OS and CPU.
Could this be the mobile compromise we need?