Another thing that I forget to mention, and the thing which actually sparked my thinking on this..is the possibly subtle link in Locke seeing a "VERY BRIGHT LIGHT" when he looked into the eye of (the island) smokey..and Ben's turning of the wheel (and hence moving of the island) also causing a VERY BRIGHT LIGHT.
In season 1 Locke reference his seeing of this VERY BRIGHT LIGHT as being "BEAUTIFUL". One wonders whether Locke subconsciously related this bright light that he saw inside Smokey as also being his ascension to leader of the Others/Island. This, I believe was also a "BEAUTIFUL" moment for St. John.
With the notion of time-loops, and even conscious time-travel, along with my hypothetis that the 'Exotic Matter' allows Smokey to TIME-TRAVEL, it could very well be that Locke was seeing a future moment..the "BRIGHT LIGHT" that he saw in season 1, could very well have been the BRIGHT LIGHT caused by the island's moving..and hence Locke's arrival to his destiny as leader. One wonders whether 'sensations' can create an IMPRESSION which hasn't yet been realised..a bit like dejavu gives us an impression of something which we should know, but can't quite attribute.
I think this knits together quite nicely, and even if it's wrong, I challenge Darlton to not think it credible
I should also add, that they could easily have used a PURPLE LIGHT to signify the moving of the island - just like when Des turned the failsafe key. But they instead chose a very bright light of no distinct color..much like the light Locke saw within Smokey.
I should further add that I've thrown in the time-travel notion because I think it could also make sense in relation to the exotic matter and Smokey, but i guess the parallel of the "very bright lights" could also work without that.
'Time'
.................................................. .................................................. ............................will tell.