I admit that when I looked through the 4e PHB, I felt a little sad that Bard wasn't in there. And I'm still trying to wrap my head around why WoTC chose to add in Tieflings and Dragonborn (Wasn't the game just fine without them?!) and remove gnomes - a race I personally love.
It does feel a little bit like a slap in the face.
I'm also puzzled, nay - baffled as to why WoTC would choose to make it so !@#$ difficult for me to upgrade my existing campaign, especially since my campaign has a barbarian, sorcerer, and gnome bard in it. It's almost like WoTC is saying "here's the excuse you need to switch to Pathfinder, or stick with 3.5 instead". I just don't get it. It makes absolutely no sense at all. Oh sure, this means they'll be able to sell me the Bard and Barbarian down the road, but it also means I might end up delaying my switch to 4e until those books come out, or indefinitely. That strikes me as a HUGE risk on their part.
But I'm withholding judgment until I actually play the game. I've read enough reports from folks who have played it and loved it, so I'm willing to give it a shot.