In 1999 and early 2000 every investing show on TV would constantly be talking about the new highs that Microsoft, Cisco, Nortel hit or the latest up and comers and the massive amounts of money being poured into it all. It wasn't the normal speal, it was like watching a cheer leading squad cheer on the the never ending boom. I don't know quite how to describe it, it was kind of eerie and surreal. And it wasn't just the investing shows that were doing it, it was being talked about all over the place, even outlets that would not normally talk about anything money or stock related.
The current situation does not seem much like that to me. Sure there are several cases of companies with sky high valuations and questionable future revenue but it's not industry wide like 1999.