If I were in Kyoto for half a day, I'm not sure I'd trek out to Horyuji, or indeed anywhere else: it's a grind by train, then it's a way from the station. If I
had to get out of town, I'd probably do Enryakuji: world heritage site, on top of a mountain reached by a couple of rail routes to Hieizan-Sakamoto, then Japan's longest cable car. Dotted with enough shrines to get 15 goshuin (red stamps), flat 20-minute walk to Shaka-do through forest, then maybe a bit of a trek on to Yokawa Main Hall (
https://www.hieizan.or.jp/). Bus links between them for the short of stamina. You could turn it into a loop from Enryakuji itself by getting the Eizan cable car down to Yase, which places you near Njan-nyan-ji (the Cat Temple), and one of the areas where the eateries float noodles down bamboo gutters, and you have to catch them to eat. Very photo-oppy.
If you're around Kyoto Station, there's film in Yodobashi Camera; if you're up near the Hankyu Line stations, there's Naniwa Camera and Sanjo Sakuraya, for example. The latter has a lot of used film cameras.
For people with enough time in Kyoto to start looking around for oddities, Iwashimizu Hachimangu Shrine has possibly Japan's shortest cable car to the entrance, and has memorials to Baden Powell (no, really) and Edison, who sourced some bamboo for his early electric lights from nearby.
https://www.hieizan.or.jp/. But no real reason to go there unless really keen.
Actually, just down from Horyuki is an information center, roughly the "Kamenose Landslide Center", which covers a landslide disaster about a century ago where a landslip dammed the valley between Osaka and Nara, causing a huge lake to build up until it ruptured. Stabilization work included driving long tunnels into the hillside to drain water, and one of these is open to the public. The hills beyond there are dotted with thousands of burial mounds and caves from around 2500-1500 years ago. Some are very accessible in a park at Takaida and there's a small, interesting museum.
Also, anything religious opens and closes early. Imperial properties are 20 minutes after rise to 30 minutes before sunset.