I can see SSDs overtaking HD in enterprise environments, where speed is usually more important than price or capacity, but in consumer goods, price and capacity are usually much bigger factors. I don't see consumer demand for SSDs overtaking HDs until price and capacity are very much closer.
Most consumer usage doesn't see a great speed advantage from SSD, web browsing, email, media playback (or encoding/transcoding) isn't particularly sensitive to the latency on a HD, so SSD makes very little difference. Unless usage patterns change (e.g. a new "killer app" that is latency sensitive arises), price and capacity are going to continue to be the driving factors in consumer electronics.
What could drive SSD demand in consumer PCs and Laptops is laptops with both a smaller (16GB-32GB) SSD for the OS & applications plus a large, cheap HD for data (e.g. media file) storage. However, that may require a lot of changes in installers and/or applications and/or user habits to get the data stored on a separate volume from the OS & applications, so it's not something that is likely to occur in a year or two. Yes, it can be done today and I've been using that method for my business clients for years, but it requires a moderate level of computer expertise to set it up that way and users don't always understand it. It can be very tedious to get some applications to install or work that way.