I'd would like to talk about the experience building a web app twice, but with these relevant techs:
The same app built using: - MeteorJS and NodeJS.
I would want to share my thought on both.
It's a pity you withdrew this... I hope the comments didn't look offensive. As said on my previous one. it does sound interesting as a topic- it just wasn't really well developed :(
the topic is really interesting to me in general but I believe your proposal needs some expansion. What exactly are you going to talk about?
Also keep in mind that not everyone in the audience is a web developer - I am :)
You really need to add some detail or something that describes what you will say in 30 minutes in the talk. You namedrop 3 subjects that each can have their own conference so a single line description really does not say much