what's required to support upcoming formats?

With the new hd-dvd formats and dolby digital and dts plus, what will I need to upgrade down the road to take full advantage?

Tv that supports 1080p?

Dvd player that supports hd and the new dolby digital and dts formats?

Receiver or processor that supports the new formats?

Will it be worth it?

Current system:
Toshiba hd tv supporting 1080i
Hk receiver supporting plii, ddn and dts

Anthem mca5

Totem mites