With the new resources... hopefully new players being drawn into the game... and new environments provided by FO:NV... I have faith that the community for fallout-fan mods will increase greatly in size -and- quality. Already I have seen people do some of the most amazing things imaginable! To put even MORE in the hands of the modders... it's going to be good.
That said, hopefully folks don't FORGET about Fallout 3.
Fallout 3 will need love, still... and there will always be those who love it for what it did.
No matter what anyone else might say about this game... it finally put me INTO THE SHOES of a wasteland survivor... and let me actually SIT behind that desk... READ the text on that computer... and SEE all those things that I'd only -wished- I could see and feel and experience. To the modders who brought me amazing energy weapon visuals... the need to drink, eat, and sleep... the ability to actually SIT on the toilets... and more guns, armor, and weapons than I care to even BEGIN describing...
Thank You... and don't forget to come back and keep making Fallout 3 better, too.
Hell, we've already got Geckos now! Why would you want to leave?