I agree with Tom,
4K is just starting.. And if you don't need 4K at this moment or within a year because a client demands it.. Don't invest in 4K.!! The upcoming 3 or 4 years the 4K market will change fast..
While i must say i really hope that Decimator comes with a 12G MD-HX or Cross version..
(Which i do say with a 12G 4K OBV running arround )
Why i choose to build the OBV 12G 4K all the way is because i have clients that demand that my live multicam delivers the same resolution / quality as the aftermovie shooters running arround with there RED and Sony FS7 cameras.
My clients are festivals that demand high quality multicam.. 4K mixdown on the SSD instead of EDL recording and bring all the content in to post...
I have a difficult time to find the best 4K camera for live production while keeping it's cost down so we don't overkill on the price.
I really hope i will find my holy grail in 4K camera that is suitable for real 4K live on festivals and events..
Ursa has 12G sdi but it's low light performance and 3 frames delay is a deal breaker
Red does not output 4K without an accesoires of 6000,- dollars
Sony FS7 Does output 4K on HDMI, but on sdi goes only up to 3G-sdi..
Sony F5 & F55 Way to expensive for rental While giving you 4K on Quad 3G-sdi
Aja Cion.. Never really made it into the market.. While it had Quad 3G 4K output. (But has the same low light issues as the BMD sensor.. While some claim it is the same sensor as used with bmd..)