Some of the most fundamental materials used in creating ICs and LCDs are beginning to run out in their natural form (some expected to be depleted as early as 2015), hence recycling old parts and R&D into using other materials may set, as far as manufacturing is concerned, some technologies back to the early 90s.
How can any rational person assume future computing technologies will be "Ultra Cheap"? Case in point, we've been making cars for nearly 100 years, the "ultra cheap" cars are the rust buckets from 2 decades ago. In most of the 1st world a new small hatchback like vehicle is roughly 25% the average annual salary, and this has been the case for the last 40+ years regardless of all the manufacturing and design advances that have come about and increase in demand for such simple models.