Some thoughts:
-I expect metamagic in the form of feats or natural abilities could well go the way of the dodo. Metamagic effects could be solely in the realm of the staff/wand/orb/whatever. I figure the metamagic rods were the forbearer of this, and they might just work the same way (probably "per encounter" though).
-I doubt tomes are gone or reduced to nothing but spellbooks, but they aren't considered equal to the staff wand or orb. The "tied to powers that reduce or neutralize an enemy’s capability in combat" aspect may have been moved to the other tools, while "teleportation, summoning, shapechanging, and a few physical enhancement effects." are either passive or better suited for out of combat use.
EDIT: Hey, that could be a handy way to control spell options such as with summoning and shapechange: only with the Tome of the Shining Pact can you assume the form of even a baby gold dragon, or with the Book of Fiery Depths you summon up special kinds of fire elementals.
-They probably also tossed the dual wielding aspect of the wizards tools as well, so its takes one hand to wield the item and one free hand to actually cast spells. I doubt you could make use of more than one at a time anyways, even if you had extra limbs. Watch out for those mutant four-armed ettin wizards, though!
-Either the "at will" abilities will be dependent of the kind of equipped tool, or the tools will just enhance them certain ways. I'm leaning toward the latter (which would imply that you don't actually need them to use it), but it could go either way.
-I don't mind the fluff added to the rewritten article, as long as that when the 4e phb comes out that those things aren't heavily tied into the sections for the wizard class, magic spells or items. At least as separate as clerics and their religions in the 3e phb.
-Speaking of which, I expect the wizardly disciplines will be presented in much the same way as the religions were, and just as easily modular, with some bonuses with orbs or fire spells, a special spell or ability it comes with, and so on. Options for generic disciplines are also likely.