You're right. I should have said "a todo app" or something similar - Rails was what came to mind first because of 37 Signals et al who make a lot of that kind of stuff.
Aside from that, I'm a huge fan of abstracting commonly made and agreed upon technical decisions further down the stack, making higher level development much simpler and less technically challenging - which is from my understanding what RoR was/is largely about. That's not to say that RoR as a framework isn't in and of itself a technical achievement though.
Try those examples on Chrome or Android (or probably anything else, but the CSS attributes are all -webkit prefixed so comparing against FF would be silly).
Chrome is just now rolling out GPU acceleration so they might actually work on some platforms but previously they (meaning Chrome and Android) were using a rendering engine called Skia and were dropping out a bunch of the perspective matrix therefore making it strictly affine and preventing any true depth effects.
Seconded, the iPad and iPhone actually have wayyyy better support for a lot of HTML5 things like CSS 3D transforms than any other browser (Chrome included).
Working prototype w/ alpha users, but there's a lot of significant tech involved - i.e. it's not a rails app.
And no, YC hasn't been on my mind at all, nor is this a 'told ya so' to PG. I do hang out on HN under a different name though so I thought I'd post for anyone who was feeling frustrated in their own journeys since I know that in-the-moment rejection can sting disproportionally more than during the time that it actually matters, i.e. the rest of your life.
Aside from that, I'm a huge fan of abstracting commonly made and agreed upon technical decisions further down the stack, making higher level development much simpler and less technically challenging - which is from my understanding what RoR was/is largely about. That's not to say that RoR as a framework isn't in and of itself a technical achievement though.