Level 90

I checked again and the next expansion pack doesn't come out til Q2-2012, so let's say June 2012.

At this point, I kind of feel like, I should try and pace myself to 85 so when X4 comes out, I can just level straight to 90 without doing endless raids.

As I mused elsewhere, I imagine a new season will be release in 6-9 months and coincide with new raid dungeons (so they can release gear together).  To get people geared up, they will just use the regular instances (instead of TOC which people hated) and give a 30% buff so things are easy.  I guess another model for that is just to give out 10 times as many Justice Points so people can gear up 4 pieces per run and be ready for 4.1 dungeons. 

One thing I wonder about is the progression.  In a regular expansion, it looks like this:

Run dungeons for blues
Run heroic dungeons for elite blues (i333 required)
Run raids for epics (i349 required?)
Run heroic raids for elite epics (i365 required?)

But in Lich King 3.1+ it seemed to be:

Get blue i200 from dungeons
Get epic i200 from heroic dungeons
Get epic i232 from dungeons/heroic dungeons (ICC)
Get epic i251 from heroic dungeons
Get epic i264 from heroic raids (ICC)

I guess its better now, because they have gearscore to lock people out.  It still remains to be seen if they will add new dungeons, or just add new raids.  Or perhaps they will keep the old dungeons and make them drop the new basic loot (which they've never done/changed the loot table before) and have the new raids drop the epic stuff.