I have been developing web sites/apps for almost a decade now. The thing I love most about web development is that it's universal. The majority of web applications are supported on almost any platform. In a world where people are more openly using their platform of choice, this is a huge advantage. It ultimately allows us to have one code base that be executed on any platform. This is the general idea behind things like PhoneGap. All a web app needs to run is a decent and recent browser.
The Modern Web Application
Web applications have come a long way in recent years. In the beginning, applications only had interface with one client - the web client. This meant that developers only handling web requests that came from the views they developed (usually in the same framework). These days however, it's all about applications interfacing with other applications. And with the addition of mobile, web applications are more in demand as ever!
To adapt to this change, web applications are now broken up into two parts: an API and a Web Client. This modularization exposes a generic server-side application that can essentially communicate with any client-side application. I call this a service/client model. When I first started to develop with this model, I began to appreciate web applications a whole lot more. These days, if I'm making a web application, I try my best to fit the application in the service/client model.
What would be great is if web applications used the same language throughout the stack. Well, if you're a JS developer, you're in luck!
With a server side application running on node.js and client-side applications running in frameworks such as backbone or angular you can now switch between back-end and front-end development without changing languages. Furthermore, if you use MongoDB as your data store, you can now have a full stack running on JS!
On top of that, node also introduced something else to web applications that wasn't really possible before (or at least not as easily achieved) Web Sockets! This allows for full duplex communication between the clients and server (no more polling!). Web sockets takes web applications to a whole new level. With it, it's now possible for clients to get updates in real time.
To further on this, I came across Meteor - which essentially is a web application platform that allows real-time communication between clients and the server. When I saw this, it furthered my belief that this is the future of web applications. The age of clients polling the web server for updates will soon be a thing of the past.