Yeah. I saw a shiny new button in gmail and clicked it...not impressed. Why are you trying to sell me an Android App from my desktop computer? I don't even have a cell phone :/ Feels bad, man.
I would use it...if it were free...but why pay for something when I could use Grooveshark for free (and happily support their ad revenue)?
Everyone seems to be copying everyone else. IE9 pretty much stole Chrome's design, Win8 stole ChromeOS's mobile, web-only design, Google Plus stole Facebook, Bing copies Google...meh. And most of these copiers haven't been very successful. (I realize that the actual extent of this "copying", as I term it is very debatable - didn't want to get into that debate - it was really more of an afterthought)