How far into the future? They've been saying that for 17 years.
They are still expanding to new countries. Last year, for instance, they opened amazon.es and amazon.com.br which are significant markets.
I don't see what's the point in comparing revenue to profit ratios in wildly different sectors.
That's fair, I don't buy the comparisons of Amazon with Google, Microsoft, etc either. It's also true that P/E ration can be misleading, for example even a healthy company might book a loss, or small profit from time to time for all sorts of reasons.
The problem with Amazon is that their current share price is around $250. For that to make sense, you need to believe that their earnings will rise so that this becomes a good deal. To achieve a P/E ratio of say 20 (still too high for a retailer), their earnings would need to go up about 150x. How are Amazon going to become hundreds of times more profitable than they are now?