This corresponds to a momentum flux of 4.7 micronewtons per square metre. If a square metre of a perfectly absorbing material is put in direct sunlight above the atmosphere, and the light hits it perpendicularly to the surface, it feels a force of 4.7 micronewtons, or roughly one two thousandth of the weight of a paper clip at the Earth's surface. A perfectly reflecting material would feel double that force. Even a 100000 square metre sail would not generate a millionth the thrust of a single SSME, though it would be a square as long on edge as three football fields. Solar sailing will almost certainly never be used as a ground launcher, though a variant, a laser launcher, could be constructed in the next five or ten years.
Solar sailing becomes attractive as a means of thrust on long voyages through interplanetary space.
A shuttle which masses 2 million kilograms on the pad delivers itself and cargo, about a hundred thousand kilograms in total, to orbit. Compare this to a solar sail. The propellant is sunshine, there is no fuel, and the thrust is continuous. While it might be fifty percent or more sail by mass, that material is not expended. A sail can be reused, or the material melted down for use at the destination.