I'll address my semi-reasonable hopes for 2005 since I lack any significant insight into the industry.
Once it is released Upper Krust's the Immortal's Handbook will receive critical acclaim and decent sales, but its actual use will be rare. It's variant take on epic spellcasting will be excellent.
The new Werewolf and Mage games will do well. Supplement sales will be better then that of the previous WoD due to its lack of metaplot elements. While a number of people will not convert to the New World of Darkness, those turned off by metaplot, and the older rules system will be brought into the fold. People will start to realize that most people that play WoD games also play other RPGs. The Exalted product line should start to cool down as most setting elements have received supplements. I imagine that a revised Exalted rulebook could be coming down the line relatively soon after Mage is released.
D&D sales will be strong, espicially Weapons of Legacy and DMG II, which should prove to be worthwhile products that offer support to DMs. More DM oriented products will be announced, but crunchy material will continue to sell well as well. Ebberon sales will be steady, and I imagine WotC might try their hands at another setting nearing the end of the year.
The new edition of WHFRP will sell extremely well and should prove to be an excellent product. Green Ronin's OGL products, specifically the Mutants and Masterminds line, Black Company, and Thieves' World will hedge out most of their d20 line.
Grim Tales sales should see an upswing as support products emerge.
In general, I think we'll see shift back towards people playing a multitude of different systems, and the d20 industry will move back towards providing support for d20 Modern, and D&D. People like me will be happy.
I'll continue to play roleplaying games, and no industry-related gloom and doom shall affect the way I play roleplaying games.