In which I shall be disgusted by the direction the feel of D&D is moving towards, not review it as a game, but rather describe why it is a new kind of game entirely.
If you’d rather read a third edition afficiando bashing 4e, go read Jukka Särkijärvi’s well-written and fun review.
New kind of game
Some characteristics of 4e that are relevant: Extremely involved combat system, combat powers that make fluff a reasonable term in that they essentially have an arbitrary effect that the fluff tries to justify, actual coverage of noncombat encounters in a potentially interesting way.
So, essentially, there’ll be three different games you will be playing. The first is more-or-less freeform roleplaying parts, maybe with a roll or two of dice now and then. Second is structured roleplay in the form of skill challenges. Third is playing Magic: the miniature game. This is a valid genre of games. It has strengths and weaknesses, like any other kind of game. I am personally not interested in it, though I will grab any opportunity to play, should such a thing materialise.
One notable weakness is a result of the strict combat/noncombat division. Given that a cleric can probably shoot lasers or sacred flames or something, can I blind someone by using these powers in total darkness? How bright are they? My warlock also has a laser. Can I use it to harm objects? All the powers are targeted at creatures, according to their descriptions.
One can see the above as a strength, too, in that it will allow one to define how the powers work. The problem here is that the rules won’t start reflecting these definitions. If I define my warlock lasers as fiery missiles, they will still harm fire elementals. Can I light a campfire with one?
The two paragraphs above are me looking at 4e from a wrong perspective. The correct way to look at it is that combats are self-contained units of fun, and what happens in them is not necessarily indicative of what the characters can do outside them. That is the purview of rituals, skills, common sense, genre conventions and the mighty prestidigitation. Accepting this is likely to make the game a lot smoother.
Philippe shows his evil side by making an attack on this post before I even had written this. He is correct in that lambasting 4e because it has laser clerics is not really valid criticism of the game, considering you can change the fluff at will, as it does not have an effect on anything, at least not in combat.
Be that as it may, there are few parts that are, in and of themselves, jokes. For example, the coin types: There is copper, silver, gold, platinum, and astral diamonds. Huh?
The setting implied by all of this material is awfully flashy. It has preciously little to do with any fantasy I enjoy. Even the D&D literature I have read is much less flashy. The Drizzt books have, in comparison, very little obviously magical stuff going on (though I am have not read the recent ones).
Maybe the style of the books comes from bad anime (defined as anime I don’t watch or like). Maybe it comes from WoW and its ilk. Wherever it comes from, it completely kills any desire I have for reading the books, running the game, or even playing it as anything except a glorified miniature game.
(A necessary disclaimer: The martial classes are an exception to practically everything I have written here.)