Strictly speaking, native clients have nothing to do with app stores or speed. I just mentioned mobile apps and some software available in the Mac App Store as

Strictly speaking, native clients have nothing to do with app stores or speed. I just mentioned mobile apps and some software available in the Mac App Store as success cases because native clients backed by HTTP APIs seem to be a much saner development environment than shoehorning an app to run inside a browser, which is limited to one language, crappy APIs, broken interaction models and lack of standards. > On the web, where the user must constantly accept and run code from unknown and untrusted developers, code must run in a sandbox to minimize risk of unwanted access to the user's computer. First, sandboxed environments are not limited to browsers (e.g., OS X 10.8). Second, browsers are often the attack vector, because they were never meant to run applications, and have broken security models (e.g., no application signing). So you end up in a sandboxed environment with terribly limited APIs in the name of security, and on the other hand have hard to trace security holes, like XSS.