C'mon Moore's Law, Hit The Wall.
No matter what the HD size is people will fill it.
When will users stop buying cameras with higher definition images when 2.2MP is the most that the human eye can see. 48-bit color when 27-bit tests the limit of the best eyesight. 4K TV's where there is nothing wrong with 1080 displays.
Corporations are inventing bigger and better devices that use more storage to no advantage. Technology has passed the point where our biology can discern the differences.
A limit to storage might force programmers to be more efficient as well. Windows patches and service packs are pushing hundreds of MB now. WTH?
Technology needs more elegance, not performance.