99.99% of the plebs that buy into the 'Galaxy Gear' thing will be running Windows or OS-X. The few diehards that use Linux on their desktop are the least of Samsung's worries at this time.
If Apple get their device line right, then the lifetime of the Galaxy Gear range as we currently know it will be very limited. Then the Samsung replicating machine will be operating at 110% thrust and a little thing like repacing the OS in the device will be a thing of the past.
Sad but true view on the state of the market IMHO.
On the otherhand, Apple might never release anything in this space.... :)