Rotary cut birch veneer is used to produce engineered timber (similar to plywood) and lightweight laminated wood furniture - check out structural and decorative wood veneer. Veneer produced in this way is typically 1-5 mm thick, depending on the application. And the sheets can be very long, because the veneer is cut as a continuous piece from around the circumference of the tree (like unraveling a roll of paper).
Before the wood is formed and laminated, it is pliable and easily damaged. But when it is bonded with adhesive, the wood composite is an entirely different material: laminating improves strength and resistance to warpage, shrinking and twisting. Applying a simple curve to a structure further improves its strength characteristics - see also lightweight laminated wood and bending wood veneer.