Surprisingly, no... they don't seem to have any intention of modernizing the game in this way. I'd love
nothing more than for them to prove me wrong on that though.
But there's good news if you're interested in 64bit Terraria and haven't heard -- there is an incredible project that successfully allows for 64bit Terraria to work flawlessly
. It's mainly for those heavily into modding the game. If you're into using large mods or many mods, I thoroughly
Standalone - [1.3] tModLoader FNA (32bit/64bit) (Branch of tML)
We're blessed to have such dedicated and amazingly
-talented people in Terraria's modding community.