Remember this moment because it probably won’t last: A U.S. lottery jackpot is projected to soar above $1 billion, and that’s still a big deal. Friday’s Mega Millions drawing is worth an estimated $1.15 billion, evoking headlines and likely luring more people to convenience stores with dreams of private spacewalks above the earth. It doesn’t seem to matter that the nation’s top 10 jackpots — not including this one — already have boasted 10-figure payouts.