If you are looking at a physical product I find it's MUCH easier to gauge both the product and the company by seeing the object, even if just a prototype, in person. Can it still be junk or vaporware if they have a booth and demo? Of course, even from major companies sometimes. But it's still vastly more information talking to a person, getting a card, and looking at the physical item then some random spec-sheet from a company you've never heard of.
Also sometimes searching through a stack of papers for that random product you remember glancing at 3 years ago rather then trying to search through browser bookmarks works a lot better, for me at least.
What i don't need though is a huge stack of paper spec sheets for every single product and iteration, that I can get online, thank you.