I wouldn't call the US cheap, accommodation is generally expensive and food too especially once including tax, tip, etc.
In any case, interesting to see that the AUD is finally falling against the GBP. It's been holding very steady for a few years even as the GBP has been in free fall. However, it's not starting to fall against the GBP and getting closer to 0.50 so will be interesting to see if the GBP can get back to it's glory days against at least 1 currency!
as mentioned earlier, many resorts that get Australians take into account our dollar. Places like Disneyland/Anaheim & ski resorts.
There is no one prices for things like hotels, theme park & ski lift tickets. In many cases I'ver seen, Americans pay far more than Australians, who book in Australia, partly due to fact that Australians have far more holidays than Americans & so stay in places longer & get long stay discounts that aren't even offered to Americans.
As mentioned earlier lift tickets in Colorado for around AU$50 for 1 adult & up to 4 kids in total, not each, is incredibly cheap, when the price at resort is in the order of us$170 per adult per day & us$125 per child per day, but don't think many people buy their lift tickets at resort at full price anymore, if any.
At 68.5 cents, that's au$248/$182.50 resp.
Max discount if you actually have 4 kids, works out to be nearly 95% off. (100% - 50/978) or not as much for less kids.
Food at supermarkets & fast food is relatively cheap in U.S., but of course if you eat at restaurants all the time & tip more than 10%, you can go through the money.