It’s Sunday Again: The Lord’s Day (?)

It’s Sunday. Even though the number of regular churchgoers in our nation has dwindled drastically, millions of people in the US will attend church somewhere today. (If the surveys are correct, reflecting an attendance of only 15-25% of the population nationwide, 50-75 million people in the US will attend church today.)
When the church attendance obligation for the day is punched, a question remains. Will God’s people treat this day as the Lord’s Day all day long? Is church merely an hour or two of obligatory activity in a day that otherwise appears little different than any other day, or will this be a day of God’s presence, power, and praise? Will this be a day of meditation and contemplation of God’s majestic Word? Will this day be devoted to considering spiritual life, or will it be devoted to physical things? In 16 waking hours (more or less), what time will God get?
In a time when church attendance at “secondary” services is struggling to reach 1/3 or 1/2 of morning attendance, what version of Christianity exists in our nation? Is Christianity a habit or a commitment? If Christianity can barely alter our activities on a day we call the Lord’s Day, how probable is it that it will change how we live our lives on Monday through Saturday?