There are a lot of young adult and kids fantasy books out there that are better than Harry Potter. But any book that gets people (kids and adults) to read in a time full of distractions is clearly a wonderful thing. And rather than appealing to the lowest common denominator The Harry Potter books do what all good books should do which is draw in a wide array of personality's with common interest and overarching themes and story lines that relate to everyday life as well as sense of escapism. However if you want to read really good young adult fantasy after you get introduced to it by a popular series, well there is nothing wrong with that, Loyd Alexander, Susan Cooper and many more are not going anywhere just because other authors are having a moment.