If all the developers betrayed by latest Apple's MBP lineup migrate to a new platform, suddenly 'majority' starts to care about number of cores and upgradable memory. But that is not likely to happen, given the dumbed-down specs and OS.
I will just look up that information directly (from the product site's Tech Specs section, or Wikipedia, or one of several other sources).
Faulting a company for not making time during the keynote to include unnecessary, largely irrelevant data is silly. This isn't Intel or NVIDIA unveiling a new microprocessor architecture, it's a consumer product made for browsing the web (which happens to need a CPU/GPU as an implementation detail).
Also, a chromebook? No developers are migrating to a chromebook. This is targeting the normal user who wants a nice laptop to do normal web surfing and text work.