A modern browser is the most full-featured application platform that has ever existed in terms of what comes "in the box".
Except for an operating system, of course.
Except for an operating system, of course.
http://programmers.stackexchange.com/questions/221615/why-do...
In the end it all runs on an operating system... so it technically falls short of that of course, but building a web-based app is generally easier than raw-coding an application from the OS level.