I have to agree, and I see this as making it also much harder for internet marketers to analyse traffic patterns. Knowing that a vistor came from Google is no longer of practical help in developing a coherent strategy. If the "google" visitor could have come from a web, a desktop, a TV or a mobile phone, then surely marketers need to start developing different ways to understand their user behaviour.
At the moment, we simply have CPA from Google vs CPA from other sources to help in marketing strategy, but now the information stays with G in this regard as to whether we should alter creative to suit phone users - or PC users or whatever. We need Google visitors sorted by source (other than Adwords vs non-adwords). But I doubt Google will have the incentive to supply THAT free opf charge.