The only restriction to SATS is the human mind and imagination.
You forgot one restriction: money!!!! We have caviar tastes and a Kraft Dinner budget, so the thought of getting these "Gucci" simulators, while enticing, is unlikely, due to the money being better spent elsewhere. Don't get me wrong: I am all about using simulators to augment training (to make sure soldiers are at a higher level than just through field training and theoretical work alone). It's just that some of the extra's can be done without in the interest of getting more of the basics. If we won the International Lottery, I would be all over getting the Cadillac version if we can afford it, but we are likely to get the Honda Civic version: thoroughly capable of getting the job done, but not having all the fancy bells and whistles that aren't really needed, and can be achieved via different (read as: through field training) means.
I have seen (and played with) a goodly number of these simulators, and they certainly have a high WOW!! factor, but they also come with a WOW!! factor price tag: in excess of $100,000 per "lane" (which is how they refer to each shooting position). That would keep them limited to only one place (Gagetown), and consequently out of the reach of the soldier's that would need to use them constantly: the field force soldiers. In a perfect world, every major formation would get them, but there are many costs associated with these big, high-end bohemoths, and if Lance Wiebe wants to weigh in, I'll let him (he's the FATS Canada rep here in Gagetown) as he would know far more than I do.
There are other more cost-effective alternatives (desktop simulation, off the shelf systems) that do less, but they can be employed in greater numbers (hence more kit out to the troops).
One "goodie" that you didn't mention (that you may not know about) that I saw that works as an aversion therapy type of device is a belt that is worn around the waist that has a Taser device (with two leads coming out of it) attached to it, and if you don't take good enough cover when being shot at virtually (i.e standing when a prone position is better) the operator can "zap" the offending soldier with a varying length of electricity to "teach" them to adopt a better position. I have a short video clip of a Capt from CTC being shocked with it that is relatively amusing, as he drops to the ground and squeals like a little girl (he received a .75 second burst - it can go up to 5 seconds). I received a .25 second burst, and I was sore for 2 days (muscles contracting rapidly due to the shock). Anyway, there are many "cool" things that can be accomplished, but like anything, there is a cost associated with them, and trying to justify that to the people who control the chequebook is easier said than done: there has to be a concrete reason that something is needed, no LCF factors allowed
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No lecture intended vG, as you know these things better than I do, but I'd hate to have all the pers reading this run to their CO asking to buy these fancy riggin's, not realizing these are major projects, and take a lot of work to procure. I love what FATS puts out (and they certainly know how to throw a good party, with lots of goodies given away to try to get you to buy their stuff 8) ), but some of it is definitely for those with unlimited budgets (look south, young man.....), not tire-kickers like the CF.
Al