WOTC is relevant to the RPG industry. It has lost its relevance to me.
My interest in their products tapered off throughout 2006, and came to a nearly complete halt after the announcement of the discontinuance of Dragon magazine. The game seems to be in an upward power spiral which I am not interested in. With 25 different hardback books to pull from, we as a gaming group do not need more rules; we would prefer simpler, more easily accessible ones. With a large (8 players) group and limited space, having to refer to 2 or more books each during play is cumbersome. As the DM, if I do not print out all of the information for any given monster or NPC (including full descriptions of spell effects and special attacks) I may have to dig through 5 or more books to run a single encounter. This has led to burnout on my part. So, while I will probably purchase some of the novel series that I began reading, I have no plans to purchase any further rulebooks or miniatures (unless they begin selling them individually as pre-painted non-collector pieces).
As for 4e, I do not see us changing from 3.5. To convince the group to make the change from 2e to 3.0, and from 3.0 to 3.5, I had to purchase the Players Handbook for all of my players each time. They were content with the older editions. I (courtesy of Dragon) was excited about the new editions. I just do not see that happening again. It would have to be an elegant, highly streamlined, well-written, easily understood and customizable work of art. That, sadly, I have no faith in Wizards to produce.