I've often suggested that self-assembled molecular electronics would be in the form of reconfigurable arrays. I found this article to back it up.
"We've now discovered molecules that act just like reconfigurable logic bits," says Hewlett-Packard's Kuekes. "We are proposing fairly simple devices that can be literally grown with chemistry. Then all the complexity will be downloaded into configuration bits once the structure is made." Kuekes expects this technology will come to fruition in about ten years, just about the time silicon will peter out. "Reconfigurable logic won't just be a good idea," says Kuekes. "It will be the only way to do computing in the future."