I'm having difficulty in not sitting on the fence with this one. To me, deep friendships without intimacy are just "friendships." The move into sexually-intimate activities, as simple as holding hands and kissing, is what pushes the friendship into the realm of polyamory, for me. And yet, I can totally see how age or medical conditions could prevent sexual contact beyond that.
Hmm... good question!
In the case of old age, perhaps holding hands is the extent of capabilities, from an intimate perspective, but the love and intent would still be there. Processing... processing...