Derek Sivers says ideas are a multiplier on execution. Zero execution with 1000x idea still is equal zero. But the right execution with the right idea is magic.

I'd argue that the execution is the idea. Otherwise you are left with, with these 'ideas' is a quick summary of a product that could exist with no mention of the market, how to market it, who to market it to initially and eventually, how to build it, when to build it, strategy, raising money (or not) etc. etc.