One problem with today's chip manufacturing tech is if you want to build system with multiple manufacturing technologies(digital/RAM/Flash/Analog) it increases your price by much because you have to package each part(which also limits your designs), test it and assemble it on a relatively large pcb. So in order to save money, you manufacture everything using the same un-optimal process.
So this is why microcontrollers like the arduino have relatively low memory.
Now if you could easily and cheaply assemble miniature electronic components - suddenly you get the optimal composition of your circuit, by picking an matching low cost components.
So you want to make an arduino cpu with megabytes of ram and flash ? now that's possible and very cheap(probably in the cents). Even something like microcontroller that could run linux and python would seem possible.
Can't wait to see it deployed.