Most utility-scale (large-scale, the thing you've referred to as "government") generation is photovoltaic.
Photovoltaics work on any scale, from watts to gigawatts. Whereas concentrating solar thermal generation needs to get a mass of fluid up to hundreds of degrees celsius, in order to drive a turbine. It's absurdly inefficient (in energy terms and economic terms) to do this at small scale, so solar thermal plants tend to be of the order of tens to hundreds of megawatts. It's still a young technology, and we may yet see gigawatt-scale plants.
You also need direct rays for concentrating solar power (CSP), which limits it to only those locations that get the very best direct sunshine.
Note that power generation per square metre is almost always irrelevant. It's almost never an important measure, because there's way more than enough space to meet all our energy demands from renewables, and sunlight is free. The one exception is rooftop systems: where the system owner is trying to maximise generation (and thus revenue) for reasonable cost, but has a highly constrained amount of surface area to work with. For what it's worth, at the best locations for solar power stations, a well-designed PV system will typically generate more watts per square metre than a well-designed CSP system. Ivanpah CSP seems to be around $10W/m^2$, which is well below what we'd get for PV at that location. But land is cheap and plentiful, so it really doesn't matter.