I think good, and not just for smaller bands or for the reasons you give.
It`s easier to get tickets for gigs , it`s easier to get hard to find albums from places like Ebay.Places like amazon have a much wider range of music than any record store i`ve been to. Lots of bands websites/myspace have songs posted before they are released so you can hear new stuff.
Plus if you get into a new band that have been around for a while you have a full biography & discography of all their stuff at the touch of a button rather than having to trawl through endless books & magazines to find out.
Since i`ve come online i`ve got into much more music than I ever have done because it`s so easy to find, and from what I gather from reading news stories albums sales are up everywhere to what they were 10 years ago.
Plus you wouldn`t have sites like this one