Voadam
Legend
I imagine the GSL change that allows Goodman to do this might entice other 3rd party publishers who haven't felt comfortable doing so to date to throw their hat in the 4e ring if they know their products won't have to be pulled again when 5e comes out in a couple of years. Who knows, we may even start to see 4e material from companies like Green Ronin and even Paizo now.
It sounds like a win win for everyone (except of course those strange folks in the minority who enjoy participating in edition wars and have vowed to fight on like five year olds).
The 4e ones will have to be pulled when 5e comes out if WotC says so at that time. This has not changed. The GSL change was solely a change as to whether publishing under the GSL requires not offering OGL products in the same product line. This means Goodman can offer the 3e ones again and that 4e 3pps can now offer 3e OGL versions of the 4e stuff they did and that 3e 3pp could do 4e updates of their stuff if they want to without shelving the 3e ones. The GSL stuff will not be secure forever the way the OGL ones are by my understanding.
This has led Green Ronin to license out a 4e Freeport companion book to Expeditious Retreat Press, but not enough of an enticement for GR to do any GSL stuff itself.
Paizo has similarly said the GSL, even with the revision, is not for them.