Generally, the same rules apply to commercial real estate that apply to the sale of a residence. If it’s not attached, it’s considered personal property. So, something like displays would be unquestionably your’s. Even items that can be removed and any scars fixed, if you can show they were purchased with your funds, would be yours. A good example would be a sign. You take it down, fix any damage to make it as it was prior to installing the sign, and you would be fine. The idea is to return the space to the way it was when you acquired the lease.
No doubt, this is going to be a good thing to run past your attorney.