Sabaton was far and away the biggest "OHMYGODWHOTHEHELLISTHAT!?!?!?!" moment.
This sums it up, but I'll elaborate a little more:
I haven't heard of Tomorrow's Eve and still haven't checked them out.
Had heard of Sabaton but never listened to them. Their video segment impressed the heck out of me! As soon as I got home I checked them out and fell in love. I've been listening to them a lot since then.
Same with DSO except I don't like them as much. They're alright, and I'm sure with time they will grow on me, but I'm not clamoring over them.
Royal Hunt I've loved for years but hadn't listened to them much lately. The video reminded me how much I like them so I've been listening a little more lately.
Andre Matos: I knew his name of course, but was/am unfamiliar with his solo material and Shaman. I was impressed that he covered a Sisters of Mercy song; that caught my attention. I've been listening to a few things here and there, but not a lot.
I'm excited about Power Quest but haven't listened to them in the last week.
I'm already extremely familiar with all the Saturday night bands, and some of them are in regular rotation in my player. Only Orphaned Land has had some increased plays, and that is definitely due to the video reminding me how much I love this band. Hearing that song played loud and the crowd cheering was really energizing!
I did not run to the vendor's room to buy any of the discs, but that's just because I was on limited funds. I might have only bought a Sabaton disc if I had the extra cash. Maybe DSO, too. Otherwise, I'd wait until I get home to check out the rest a little more before buying mp3s or CDs.