Not to mention all the Eugenias - many of which max out at like 3 to 5 feet (so I read). They seem to do great in pots. I have a pisiformis going, so proud of myself. Someone on Etsy sold a slightly bigger for like $400+.

You're a man after my own heart, as the expression goes. The indoor fruiting houseplant thing is what I have been working on for awhile now. What I love about this is that it's mostly untread ground, with these plants themselves being rare even sometimes where they naturally grow, not to mention rare enough in the ground in the parts of the USA where they can potentially be grown.
I knew I was forgetting something. Eugenias might be better candidates than plinias are... I have Eugenia sp. de Goiania, see pic below and ignore the misspelling (heh) on the tag.

It's pushed out more leaves since then and is starting to grow from the roots to take on a bushier form, but is that not a very aesthetically pleasing plant? I am excited to see if it really does taste like banana.
A lot of my random plants just seem to be very aesthetically pleasing on their own. Imbe, as this topic is about, is a great example, though I think all the garcinias look great as houseplants. My Canarium subulatum is probably not the best candidate for an indoor plant due to the size the will reach, but it's got a very attractive growth form. Variegated katuk has very interesting tasting foliage, flowers, and fruit aesthetically and would be another great candidate for an indoor plant if it can handle the indoor conditions (I need to test this one more).
Annonacae like annona monticola may be good candidates too, one of the species I experiment with.