The point is that Native Client binaries are arch-specific. You only get the archs that you build for: If someone puts up a NaCl site with only x86, it won't work anywhere else. This is a horrible thing for the web.
Yes, you can build for more than one arch. But if you have x86 and x86_64, you are missing ARM. If you add ARM, you are missing PowerPC (consoles) and MIPS (some phones). If you add those, you are still missing new archs that will be invented later.
For this reason Google is working on PNaCl - but it has other issues.
Yes, you can build for more than one arch. But if you have x86 and x86_64, you are missing ARM. If you add ARM, you are missing PowerPC (consoles) and MIPS (some phones). If you add those, you are still missing new archs that will be invented later.
For this reason Google is working on PNaCl - but it has other issues.