The game comes directly from Nintendo eShop, you will be able to go online, get updates etc.
After setup process the game will be available to launch on your own account, just as any other game or app you purchased directly in Nintendo eShop.
An epic adventure across the land and skies of Hyrule awaits in The Legend of Zelda: Tears of the Kingdom for Nintendo Switch™. The adventure is yours to create in a world fueled by your imagination.