Well yes, you need to retopo the original base model to better fit the new geometry of the high-poly, but I left that part out due to this being a forum post about the fact that you can use textures to fake detail, not a ZBrush tutorial
The general process is that the artist will create a low poly mesh of the character (image 2). They then load this into a 3D sculpting tool which hugely increases the polycount (to the order of hundreds of millions of polys) but allows the artist to work pretty much as if they were sculpting in clay. They can add as much as detail as they like here and the result is image 1 - all the detail in this image is polygons, none of it is textures.
The sculpting tool then compares the high detail model with the low detail model and creates a 'Normal Map'. This is essentially a texture which, instead of storing colour at each pixel, it stores the difference in the angle of the surface between the low poly and the high poly version.
The result when the normal map is applied to the low-poly model is image 3; pretty much indistinguishable from the high poly model but thousands of times simpler and faster to render.
The only parts that really show it's low poly at all are the edges of the model where the polygon angles give it away (look at the creature's back and the top of it's front leg). This can be reduced with tesselation, where the graphics card dynamically adds extra polygons at the edges of the model to smooth out sharp angles.
It's not so much 'people who are high' that I find tedious, it's 'people who define themselves by the fact that they smoke a lot of pot', who wear HI-LARIOUS 'take me to your dealer' t-shirts and seem to talk about nothing else, high or otherwise.
That's something you don't generally get much of with drunks (although I agree, the people who DO do the equivalent with booze are also very tedious people).
The interesting thing about the Marajuana is the extent to which it's been legalised. Here it was declassified which just meant that if you were caught with a small amount then you'd not get prosecuted. The US states have gone 'full Amsterdam' with plans for licenced shops to sell it and licenced growers.
I can see the plus sides - it essentially puts the dealers out of business; it can be taxed; and it ensures that there's legal laws for quality control. I generally find pot-heads to be incredibly tedious people though but that's just me.
Until I started playing World Of Tanks, I have NEVER put so much time into playing a game as Frontier on the Amiga.
Try firing it up on WinUAE, set to emulate an Amiga 4000. It completely eliminates the pretty atrocious frame-rate problems it had on the 500 and 600, and makes it even more of a joy to play.