sorry PICO, I believe it's going to be bigger file. I hope there will be some extra data . And I guess that it will be the same file format.
But.... let's wait until the release day (not known exactly yet).
funny; i got an e-mail (30 March) from Big Brother (esri) saying that i should not make any announcements before the release date. hm, it just must be one of these things
Anyway, the new map is due on 7 April.
I will post later some more details regarding the update.
General description of some changes in the new map:
"Add new images of Junction View (for compatible devices only); (850 junctions with 3,400 images for day and night mode)
Update POIs (Point-of-Interest) and road data for the whole country (over 530,000 POIs)
Add the exits in Highway Mode for major roads and highways (for compatible devices only)
Add Land Info for Bangkok and its perimeters as navigation aid (for compatible devices only)
Update telephone numbers (130,000 numbers)"
128 MB approximately for map in Thai
115 MB approximately for map in English