He did write a sequel of sorts to Generation X called Generation A in 2009. I haven't read it so I can't comment on it, though I suspect it is already 'of it's time' in the way that, say, Microserfs is. It's a fun novel to be sure, for something that emanates a huge "now-ness circa 1994" it's still very enjoyable today, but maybe that's because I can vaguely remember life back then. I'd wonder what a younger reader might think about it?