You killed your raid content mobs, you topped out your player versus player (PvP) rewards, you leveled to the cap only a month after the last expansion and, in only a few weeks (or days), the newest content addition to the game is coming out; the dreaded expansion.
Most MMOs that offer expansions which increase the level cap cause depreciation of old content. Let me explain. While features or content are not removed, and backwards compatibility is maintained, the content previous to the expansion often becomes obsolete or out of date. There is little reason for players to go through old content when there's obviously a new and better way of doing things.
Blizzard has prepared for Wrath of the Lich King (WotLK) by making previously challenging raid encounters significantly easier, forcing some folks to cry foul as their hard work becomes "cheapened". The drops now pull from the same loot tables as they did before the change, but with significantly less risk and challenge.
So my question to you is, do you care?
Some of the folks on our World of Warcraft board discussed this very thing last week, and the replies, barbed though they were, elicited strong responses on either side.