Here is a article from the experts,
https://www.hagerty.com/articles-videos/articles/2016/05/18/long-shot-collectables
But it depends on 4 factors from my point of view desirability/holding its value long term:
1. The boxy/old school shape which is timeless and the only thing similar is the G Wagon and the Jeep Wrangler but if this is the last one from Land rover then yes, but looking at spy shots of the new defender which like other post mentioned looks really similar to the LR4, and is basically the spirtual succcessor then no.
2. Advancement of electronic vehicles within the next 10 years, then this era will be known as the last of the ICE era, a la similar to 60's muscle cars, so two categories that will receive big bumps is sports cars and off road vehicles.
3. Reliability/Ease to work on/repair: The LR4 fits the off road niche market with the Landcruiser/wrangler so it has that going for it but unlike the sports cars/racing which is considered a rich mans hobby, off-roading at least in America is still stereotyped hill billy/ bro truck and the budgets associated with that demographic is much lower thus having it to be reliable and easy to work on is a major deal. Disco 2 is gaining a niche status, and if LR3/LR4 prove to be more reliable and similar in ease work on than yes.
4. Rarity: Total Production numbers: this is self explanatory, I don't know how many were produced and how many are still on the road, I think other members know much more then me as i just recently got into the game but if there are only 1000 LR4's on the road in 15 years, your going to have something special.
References of common car brands that produced cars/trucks with good long term good desirability/resale value:
chevy ssr, vw phaeton, e39 M5, honda s2000/mk4 supras (90s japanese sports cars), fj cruiser, raptor, wranglers