Regarding LightSwitch HTML5 output, heard this tweet by Hadi Hariri (@hhariri):
"LightSwitch now outputs in HTML 5? They didn't just kill Silverlight. They nuked it and then took a dump on it's remains"
Google new language is a visual language a la scratch and (the late) Andriod app inventor, but in a browser. I have a feeling we'll see many more of these (visual languages in the browser).