This would be great, however I think it should be a different item, rather than replacing the current Teleporter item.
There is a lot of other uses for the current Teleporter which goes beyond basic travel, such as the linking two teleporters to one, and even using them to activate traps and other cool mechanics possible in Terraria.
I think that this Teleporter should be a separate item, which is fairly difficult to obtain for balance issues. Maybe something like:
1 Teleporter
50 Nanites
500 Wire
Just a suggestion of what it could be made of. If it's still too easy to obtain, maybe an item from an upcoming update could be added to the recipe, to add more challenge in getting the teleporter.
With the two different teleporters, everyone would be happy. Personally, I like the idea of this, but do kind of think that this is quite an unbalanced item to obtain for so little from the Steampunker, and shouldn't replace the current teleporter.
I still like the idea of this item very much, though it could do with some minor change.