England pushed the Kangaroos close in Brisbane on Saturday but ultimately fell short against the tournament favourites, with Boyd Cordner's try proving to be the difference.
Wigan Warriors full-back Tomkins, who was overlooked for the competition by head coach Wayne Bennett, was impressed with England's performance and feels there is a bright future for the national side.
He told the BBC: “If you look at how England have improved over the past seven or eight years to reach this stage, this is as good as we have been.
“Losing to the Aussies by six points means we are definitely on the right path and just need to keep that trend going.
“We are gradually building, getting better and better year on year. We are getting stronger squads, we are getting more competition for places, and that needs to continue if we are going to compete with Australia.”