There is a lot of relevant music out there new and old, from america and elsewhere. I listen to a French radio station via internet. It's amazing how american musical forms such as blues, rock, rap, folk, etc have influenced world music. I find it to be an exciting time to be immersed in music right now with all of the sharing of styles and collaborations between artists happening on a global level.
If you listen to commercial radio, or even highly genrefied sattelite radio you aren't going to really hear what is going on out there.
Try to find groups like Blackalicious, the Dining Rooms or Bumcello. Or Micheal Franti and Spearhead, or even the newest songs from older artists such as Neil Young and Bruce Springsteen. You don't hear them on commercial radio.
Those out there who think modern music is all Britney Spears dreck are woefully wrong and missing out on some of the best music of the new century as well as some of the best from back then that you somehow missed the first time around.
If you want to see where REAL music has gone in the last 40 years try:
Radio Sing Sing-
http://www.sing-sing.org/ -From Paris France -truly freeform radio without borders playing quality music ( I am currently listening to Dizzy Gillepsie, earlier they played Morcheeba, Bo Diddley, Funkadelic, Roy Orbison, Nick Cave and a host of French and world artists too numerous to count.
and Radio Paradise-
http://www.radioparadise.com/ - from Paradise, Ca. Many old favorites here that anyone of the woodstock era would recognize along with intriguing new music from both old artists and new.
I love 60's music, but music didn't end then and there is a lot more great stuff out there. It just isn't mainstream anymore, which is not necessarily the fault of the artists.