I did some quick math on GDP numbers by country, just making the very rough (and I'm sure incorrect) assumption that Uber will take a similar percent of each countries total spending.

I originally wanted to argue against you, by saying that Asia has some very large and fast growing non-China/Japan countries... but I'm not sure the data shows that. US+EU is $35T total GDP. The largest non-China/Japan Asian economies, India+Indonesia+South Korea+Taiwan+Thailand+Hong Kong+Phillipines+Malaysia is ~$7T[1]. Is it worth all the risk and effort to add only 20% of your potential business?

Maybe, and those countries do have higher GDP growth rates[2]. But given the small market sizes, difference in laws, and substantial local competitors (especially Grab), it doesn't seem like being in Asia should increase Uber's worth by a large multiple, relative to Lyft. That said, if being in Asia is responsible for 20% of Uber's valuation, that is still a gigantic $14B, larger than many fortune 500 companies.

[1]-https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nomi...

[2] https://en.wikipedia.org/wiki/List_of_countries_by_real_GDP_...