i fully understand the tech process and the concept of 'planned obsolescence'. my comment was tongue in cheek, in that given that process, a 24mp sensor coupled to epic zeiss glass will not become obsolete, certainly not in a year or two. there is nothing out there comparable to this sensor/lens combination, so the word 'still' is still inapposite.
to your question, ive not seen an a7 for $800, in fact the cheapest ive seen was just below $1000. eventually i'm sure it will sell for $800, but: it does not come with any lens let alone the epic zeiss 35/2, which can only be had with the rx1. adding even the less adequate zeiss 35/2.8 makes the total cost of each equivalent; it is not a silent leaf shutter; i am uncertain whether it can match the high iso ability of the rx1. thus my answer without question is the rx1.