Grug
Veteran
And for the sort of programming recently done on the Alexa, it's likely the bulk of the budget will be for actors, transport, location, costumes, crew wages, accommodation etc etc - the difference nowadays between 4K and 1080 production costs is likely to only account for a small percentage of the overall budget. No, I don't see any 4K Alexa being used for run of the mill broadcast work, but I do see it being used for TV production of the likes of "Downton Abbey". Even though at the moment there is no 4K broadcast route in the UK, I'd think it well worth any extra cost from a future proofing point of view.
Sound logic, but I just don't think it holds true for the reality of things at the moment. 'Major' motion pictures ($100+ million) that are intended primarily for big cinema screens, are being shot in 4K but having both their post-production and projection handled in 2K (generally 10-bit DPX from the sounds of things). And no-one spends the money to go back and re-master these things in in higher resolutions unless they're a Lawrence of Arabia/cinematic masterpiece kind of thing.
And if $100m motion pictures can't afford to do it, tv series certainly can't.
Things will move to 4K eventually, of that I have no doubt. But I highly doubt the transition will be any faster than glacial pace of the move from SD to HD. Especially since most people struggle to see the difference between 4K and 2K in real world viewing conditions.