When the iPhone made its debut in 2007, I took my old cell phone and my MBP to keep me company in line. Made a final call on that old cell phone, had fun playing with my MBP and chatting with others in line..... In 2008, I had my original iPhone, nothing else, in line with me when I arrived at the mall and the line shortly after 5:00 AM. I didn't get up at the crack of dawn for Launch Day 2009, and instead went over to the Apple store later on and joined in the line that was ongoing. It was really cool that at the 2008 Launch Day the mall provided collapsible stools for us to use and later told us we could keep them.
It would be fun if there is a big Launch Day and a line for the iPad, but if not, well, that's OK, too. Since, yes, there will first be the launch of the wireless-only and then a few weeks later the launch of the 3G/wireless, that undoubtedly will make a difference.
However it all plays out in the end, at some point in time I will be the happy owner of a new iPad......