Agreed. I will add that, in the absence of the Executive Branch making such a substantial signal (as opposed to the rhetorical signals in Obama's speech), at least the "fourth branch" has shone a light on the matter. It is a weak light no doubt, and is characteristic of the spineless institution of local broadcast journalism, but the fact that the issue was mentioned at all implies an evolution of the American psyche on this. If Obama, in his heart, believes in "fairness and justice for all", he has no better opportunity to demonstrate it.
Also, I keep thinking about how events like this (e.g. 9/11) engender sympathy and support from other nations. America can build on that goodwill--rather than dishonoring, abusing, or squandering it--and regain a fraction of international moral stature by ensuring Tsarnaev is treated as legally and morally fair as possible. This is a longer term, strategic goal (i.e. politically, socially difficult) that has been undermined and overlooked for too long.