The majority of companies funded back then were e-commerce plays focused around selling the same items you buy offline for less money and making up the difference with VC money. As a consumer, it was pretty awesome. I remember signing up for AllAdvantage.com in high school (that was a startup that would pay you to view ads, and pay you for referring friends to view ads), installing the toolbar, pocketing about $50, and then uninstalling the toolbar once they crashed & burned and were no longer paying out money. My sister (newly arrived at college) fell in love with Kozmo.com, which would deliver groceries to your door at about 20% under supermarket prices.
The whole thing was a pyramid scheme designed to prop up valuations by incentivizing early adopters with discount prices, subsidized by VC dollars, who would unload the shares on the gullible public markets for higher valuations. The early adopters got some nifty conveniences at bargain basement prices; a few lucky founders & VCs got massively wealthy; most of the unlucky founders & employees wasted about 5 years of their life; and the gullible public lost their life savings.
There's some of that now, but it's much more muted. My wife and I ate very well this summer off delivery startups that were offering FaceBook deals with VC money for prices under supermarkets. However, most of the giant companies this time around actually have solid business models that operate more efficiently than existing incumbents. AirBnB takes advantage of surplus housing capacity. Uber breaks local laws that enforce inefficiency. WhatsApp ran a really lean organization so they could offer text-messaging services at a fraction of the cost of a telecom giant. Instacart charges more than the supermarket, and people pay it. Slack has made office messaging fun. SnapChat at least realizes that its lack of revenue is a major problem, and they're heads-down trying to fix it.
The public markets are not as gullible now as they were then, and so the "unload on the unsuspecting public" strategy doesn't work as well. Companies that are based on nothing but hype & investors dollars often flame out around the C round now; we saw some of that with Secret and Homejoy.