The goal is "make it possible to create an app with NO programming knowledge".
The ability to create "trivial" apps and then run them on your cell phone can be exciting for many people. I think this will increase the appeal of Android as a consumer device. Of course, a big flood of trivial (tool-created) apps in the Android market may reduce some of that appeal, but overall, this seems like a good move by Google.
It will be interesting to see if more people buy Android phones because they can now create and run their own apps on their phones
There have been visual app generators before, for other platforms. None of them took the world by storm, and mostly were very limited and/or actually quite hard to learn - different from regular programming languages, but still with a learning curve. The devil's in the details, and a good programming language "makes easy things easy and hard things possible". App generators often succeed very well at the "makes easy things easy" part but fail at the "make hard things possible" bit.
On the Internet, we saw a lot of 'personal home pages' which were basically globally accessible bookmark menus.
Those had limited utility because they were public and only available when on-line.
By comparison something as 'easy' as Frontpage would be great for making a personal single-purpose app for your phone. It doesn't have to do a great deal to be useful - perhaps it would just show the RSS feed from your school events society. Maybe it would just make a ping sound when you touched the screen, or be a really simple game just for the fun of it.
If we are talking about 15 minutes of setup and build time then the apps really don't have to do much, and they only have to be useful to one person to get made. But it makes owning the phone much more interesting to people who are a bit geeky but don't code, which is important for Google.
(Compare to the iPhone - where the easiest option is to set up a web server and build a single-purpose web site. That's easy for us but for a 10 year old it's a huge barrier.)
That does not look like no programming knowledge to me.
Has anyone ever actually demonstrated that a "visual" programming language is easier for non-programmers to learn programming than a language with a relatively simple syntax, like Python? How is that picture significantly easier to understand than
when Button1.click:
Screen1.BackgroundColor = BlueGraphical programming removes choices and options. However it also removes ways to make mistakes.
Try this: http://quickfuseapps.com/app/edit
It's for building voice apps, and believe me, it's easier to learn than anything in the space (VoiceXML, random proprietary APIs, etc.)
Java isn't necessarily easy to learn, and that's all that Android has right now.
Code is only a means to an end. If you can achieve the result you want without it, then it's just an obstruction.