Fallout 3 was released at the tail end of 2008, New vegas in 2010. 

To this day, me and many other fans play Fallout 3 & New vegas on a very regular basis.

We've seen many other last gen games rereleased in the form of definitive editions andthey do very well in terms of sales and reviews and are for the most part very well recieved. 
GTA V, The last of us, Metro and so on. 

The Fallouts would benefit from definitive editions so much. 
Give them graphical touch ups, better draw distance, fix the few problems both games have with glitches and crashing.

I'd blow up Megaton, sacrifice fawkes and install the FEV virus in the purifer for this..

If you would prefer to make a kickstater to fund it, I'd happily back it. 

If this all goes well, you guys should consider rereleasing oblivion and skyrim on the ps4.. Oblivion with trophies would be sweet.. just saying. ;)