I've seen a few tribute bands in recent years and, many years ago, played in a band that featured a lot of Eagles music, but that was before "tribute bands" were invented (none of us looked like anybody, anyway.)
I'm often amused by the band names; B-Eagles, Shanias'Twin, Fleetfoot-Mike, Floo Fighters,etc,etc, but I nearly always find myself wincing with embarrassment when the, supposed, look-alike/sound-alike frontman attempts to remain in character between songs. On one occassion I went to see a friend who was playing in a U2 tribute band and, while the music was passable, I felt like slapping "Bonos'" face everytime he attempted a bit of banter with the crowd. He sounded more like like Val Doonigan!(remember him? Now there's a tribute in the making)
Another time I met a well known Al Jolson act when he barged into the recording studio(while we were recording!),he spluttered an apology in his best Jolsonese (I heard Jimmy Stewart) and left.
Apparently this guy is in character all the time! He IS Al Jolson!
I've payed tribute to many performers over the years simply by recreating their music but I do at least try to make it a version rather than a straight copy and can't imagine what kind of experience it is to go on stage and pretend to be someone else.
I can see (to a point) the value of tributes to bands that are no longer performing but I wonder about the validity of those attempts to copy bands that are currently performing.