Nokia took to Tweakers to explain that those were trial runs to test the new software, and the actual WP 7.8 update with the resizable tiles and all, is not expected to hit the release stage until early next year.
Naturally, you can always wake up your inner hacker, hit up the NaviFirm servers, and try to call it a day with your pre-WP8 Lumia, but a few more weeks of waiting sound more advisable than that.
