How does this compare to GTK in terms of features? Maybe somebody can use it to make the state-ful GUI browser that the "office" industry sorely needs so we do

How does this compare to GTK in terms of features? Maybe somebody can use it to make the state-ful GUI browser that the "office" industry sorely needs so we don't have to force DOM to act like a real GUI (which it does painfully and poorly). GUI's and mice do most the real work; let's not give all the standards attention to web toys and mobile.