It'd be nowhere as detailled as the current maps.
If you look at the current technology available for other sims, the average level of details of a global map is way below what we had with the old caucasus map.
And it's crippled with oddities, like western building in the middle of Africa or Asia, messy road networks, strange coastlines, etc.
Also, if those other sims are anything to go by, it would means that all the objects (houses, trees, light poles, etc) are just textures. Poor mesh for the majority of the planet (welcome back jaggy mountains...).
It might be detail when you're flying an Airbus at 30.000 feet, it's not when you're flying a helo at tree top level. And it remains to be seen how the DCS AI will integrate into all this, which is something other sims don't have to care about.
Ultimately I think the expectation for this world map are overblown.
If you use flight tracking tools in those other sims you realise most people stick to areas that are enhanced with payware terrain/airports. Plenty of people on both US coasts and Europe but good luck finding a soul in Azerbadjan, Ethiopia or Laos. So you're back at square one.
Really, the problem isn't with the map prices, it's with a small amount of people who have absolutely no idea how much work goes into them.
By all means, get into map development and see for yourself.
Acquire the topographic data, the rights to distribute satellite imagery, create all the 3D assets from scratch (and don't forget the additional AI units to go with it aswell as the miriads of skin for the already available aircraft), tweak everything so it runs smoothly and then sell that for $10.
There are much less painful ways to homelessness...