Cripes chaps it's not that difficult to follow.......
The 7.7 was announced almost 8 months ago and in many markets the 3G version is still not even available.
As Sammie themselves (and other manufacturers) are now starting to announce quad core products it'll set expectation in the marketplace that quad core is now the base level.
This discourages buyers from buying dual core products.
Fewer sales means developers less inclined to work on a product that's perceived as out of date.
We, as owners of 7.7 devices get fewer ROM options.