Fortunately The Verge has found out that Surface Laptop owners will be able to upgrade to Windows 10 Pro for free. Normally the fee is $49, which to be honest, doesn't sound too bad, considering the improvement that comes with app freedom.
This deal only lasts for the rest of the year, though, and if you are buying some other Windows 10 S product you are out of luck and have to shell out the money if you want to upgrade.
Microsoft also is giving away one year license of Office 365, which is coming to the Windows Store, with Surface Laptop.