The Miracle (Of Joey Ramone) is not the first song that the band themselves have declared to be a single but have not released as a commercial single (that title goes to Original of the Species). However, given that Original of the Species was the fifth cut taken from its album and promoted (via video and promo CD) two calendar years after the album's first single, the differences between the two are significant.
Is this the end of the commercial physical single for U2, minus oddity releases such as the limited edition 10" vinyl release of Ordinary Love? Invisible was given away freely online and then only ever sold as a lossy downloadable track.
I understand that the market has changed significantly, and the glory days of U2 singles coming as two CDs and maybe a DVD, 3" CD, 2-track CD, 7" vinyl, or 12" vinyl are gone, but I do wonder if we've really seen the last true single, the last b-side.
I know that the general public won't buy these releases anymore, but I do wish that the releases would continue, perhaps being sold exclusively on U2.com.