Hard to say. There are alternatives out there - Fein vacuums, Mafel double dowel tools, other track saws. It would be tough to go double again in price for the green and white (I have a TS55, Domino 500, CT36, OF1400 and a 3 meter track - and I'm a hobbyist, not a pro). If I were making income from this I might have a different view.
The phenomenon of lower prices in the US is nearly universal and is not specific to Festool.
The price advantages in the US have been that way since the conversion of war production to consumer goods at end of World War II. It is common to hear people visiting even from China shocked because the prices of Chinese goods in the US are significantly lower than they are in China. Twenty years ago I got the same reaction taking Japanese visitors to local electronic stores.
The low prices are due to a lot of factors.
1. There are no internal trade, language or cultural barriers. You can set up a service distribution and repair center in Kansas and it's good for the whole 300,000,000 of us. This keeps costs down.
2. Per capita disposable income is the highest in the world. Thus demand per capita in the US is highest. This keeps costs per unit sold down even more.
3. There is no national VAT.
4. The Almighty Dollar is the international reserve currency. Having an income in dollars makes it easier to pay international debts and provides a form of currency and economic arbitrage. This again is a cost advantage you get by selling in the US.
5. Competition is stiff because it is such an attractive market.