Reason being that using names of such public landmarks avoids potential trademark infringement that might be triggered by almost any other names, given the number of trademarks in existence today.
Trademarks are domain specific, there aren't that many that they could infringe on. They could make Comet branded CPUs and unless they packaged them up in green cylinders there's no chance people would mistake them for the cleaner.
Intel are in more markets than just CPUs. And any time they enter a new market, all those trademarks from that market come into play. That's what I heard from the Intel folks that described the reasoning.
