Performance. Show me some like gears of war running in a browser and then I will be convinced.
> The best argument against javascript + WebGL is "javascript is bad."
That is the worse attempt to portray the other side's argument I have seen a while.
> The lack of static typing, for example, allows a REPL.
You can also just have a console implemented, like most AAA games. They are also built into engines like Source.
> It's true that with an average gamedev team, you'll get below average results. But with an above-average team, powerful languages tend to translate into stellar results.
I don't understand how javascript would allow someone like John Carmack to make anything new, I write Javascript every day but when it comes to games I much prefer something like c#.