Great players come and go,the club will survive and move forwards..Any of the big players that have left Arsenal over the last 10 years,i've never felt down about any of them going...because we had thier best years out of them.
Henry was great yes,but last year he didn't show much heart and sat on the side lines with a slight strain here and there....you wouldn't see a Gerrard etc sitting out of games with a "slight knock"...and Henry was meant to be the captain...so much for leading by example.
I'm sure he will do well at Barca though the guy is super class,i'm just suprised they didn't ask for Eto in exchange,as he wants 2 leave(so reports say)...then again, maybe Wenger wants Eto at Barca!!! I think Wenger will be off soon as well,which is a FAR bigger problem then Henry leaving. I hope Van persie and co step up to the plate now and show there is life after Henry. Still its a shame the Premiership have lost such a great player,but everything ends eventually.