I doubt that RIM would partition or put aside extra memory for the OS. If you notice most or maybe all flash devices come in similar sizes. 1GB and 2GB for old devices. 4GB and 8GB for cheap and entry devices, and 16GB, 32GB, 64GB for the rest. SSD's are usually sold in the same way also at 8GB, 16GB, 32GB, 64GB, 128GB, 256GB, 512GB. There are SSD's that have specs saying even 120GB, 240GB, etc.
Originally Posted by zektor666
What I'm trying to say is manufacturing devices with flash memory that does not fall in the category above usually costs more because the memory chip itself has a specific capacity.
Look at the iPod Touch/iPhone/iPad. They have a set given amount, and the OS increases constantly. Especially when the iOS(X) changes. A 8GB iPod Touch use to have around 6.1-6.4GB of usable memory (don't remember the exact number.) When the < 2nd Gen updated to iOS4+ it took over a good 100+MB extra of the small space. Then iOS took another good chunk of space. I won't be surprised if OS2 takes more space then the current OS as OS2 will have the extra native apps and whatever "goodies" RIM has stored for us.
.....but....................you don't have to worry about buying a Playbook with a higher capacity because the update won't be too much larger then the current one (hopefully), unlike Apple.