Rolls-Royce has been the FTSE 100's biggest success story in recent years. Understandably, investors who haven't held Rolls-Royce will think they've missed the boat. Either way, I think two UK shares have a lot of long-term potential. For example, Raspberry Pi's AI HAT+ 2 board enables customers to run both LLMs and VLMs (vision language models). I think this presents a dip-buying opportunity to consider, because the long-term growth story for the radio communications firm remains intact.