I wrote about Kindle here. While I don't want one now, I would be more interested in a device designed to handle a wide variety of content types: blogs, websites, books, newspapers, magazines, etc. I currently read books and do a little online browsing (checking weather & movie times, email, and Google Reader mostly) on my Treo, but many websites aren't really readable.
I am not, however, going to make any predictions because I am really bad at it. For example, I predicted that there was no way that George W. Bush would become president in 2000.
Also, back in the late 1970s or very early 1980s my brother and I saw something on TV about the new trend of filming rock bands performing their songs and creating little movies out of them. I think the show featured an interview with Michael Nesmith who claimed that these "video records" would be the next big thing. I thought it was possibly the stupidest thing I had ever seen. I predicted the trend would go nowhere.