The videoclips of fans of the Blur that Clark, Chloe and Lois watch near the end are actual fans of Smallville who sent them into the CW in November 2010.
Alexander seems to be right handed unlike Lex was.
In the show, the VRA is repealed by a "national vote." However, because the United States is a republic, not an absolute democracy (see Art IV, Sec 4 of the US Constitution), there would be no such vote. Even if such a vote occurred, it would not be binding, but have no more weight than a national poll. Overturning a law would require Congressional action.
Lois told Clark that he is an American Hero and Martha told Clark that he is also the Light alluding to his future as Superman approaching.
This is the first episode since Lazarus (the season premiere) and the second episode overall that all credited main characters appear.