I like all these bands and having toured and been in the industry, am very familiar with them, and in fact am friends with a guy from one of those bands. What separates the new bands and the older ones is not really about playing live. It is more about SONGS. Mars Volta and Dream Theatre are fantastic players and have excellent live shows, but they don't have any songs that people can name. Everyone can name a Queen track, a zep track..etc. At the end of the day you have to have the songs and the live show if you want to be considered one of the best.