I think it looks great! I'm super excited to see the Land Cruiser.
I'm not totally sure the LX will be bigger. It seems like it should be, but the new Tacoma has a slightly wider track width than the LX600 and shares the 9.5 rear end. That at least points me to the idea that they probably share axles and the width variation is just the wheel offset. Current 4Runner has more interior volume than the LX as well. It's starting to look like they'll be the same size with different bodies and suspension setups.
All indications are that the GX will come with the same TTv6 as the LX and a hybrid option with the turbo 4. So, you probably don't have to choose between them on engine options. It's also possible that the hybrid version of the LX will have the turbo4, not a TTv6 hybrid. But it's looking like the Land Cruiser version will only be turbo4 hybrid.
Agreed on the interesting trucks. I don't think Toyota did a great job with the Tundra. It's not really off-road ready, even in TRD Pro form. I mean - it's fine for fire roads. But it's not meaningfully different from a regular SR5 with the TRD OR package. It's low to the ground, so heavy, poor angles, and plastics that are not well suited for offroad use. It's still $10k in parts away from being ready to go. On the plus side, the factory lift is comprehensive and well priced. And a TRD OR package is available on almost all trims and it's not terribly challenging to add tires, armor, and a winch.
I think the new Land Cruiser will have everything the Tacoma Trail Hunter has, plus some. The 4Runner almost certainly will come in a matching Trail Hunter trim so if the Land Cruiser doesn't, the 4Runner will. If one or the other has 35's that are easy bolt on without requiring a re-gear, that's really all it'll need to be pretty desirable. Even if the top doesn't come off. I'm okay with that.