Android is not as open as I would like, but most devices still let you tick one checkbox in the preferences and then install whatever you like. The tools are open and free and work on Mac/Win/Linux.

I think people wildly overestimate how much money the typical app can make in any of the app stores but I do think it's important that we find ways to make it easier to monetize web apps.

Won't the first thing the kid with an Android tablet who wants to start hacking do would be to learn how any application can be installed in the device?

> Can you write/submit an end-user programming app like Scratch?

Yes, you can. e.g AIDE : https://play.google.com/store/apps/details?id=com.aide.ui

Android isn't google play. You can install any apk files you want onto your android device. No hacking or rooting or jail breaking required.

at least you can write an app and install it on your device without JB. That is already a huge advantage over iOS. Android is changing rapidly and we don't know what the future will be, however, we all know where iOS/MacOSX/windows will be heading. For me, it is no brainer -- i have to jump off their boats ASAP.