Even more notably, talk of a Cat diesel-electric dozer would have been greeted with gales of laughter 12 months ago. Not now. Mind you, IMHO the video that they released at the time WAS a bit of a joke.
I personally have NO idea what Cat may have on the drawing board since they have, in their 'limited wisdom', chosen to not take me into their confidence. How-wevver, the only dozer bigger than the D11 currently on the market appears to have shown itself to be a bit of a 'fizzer' with dead ones lying all over the place and D11 sales beating it every which way. Maybe there is a market for a bigger dozer in jobs like mine reclamation which is likely to become an even bigger task in the future.
Maybe I'm a trifle myopic but I can't see a lot of application for a bigger dozer in most contracting/civil engineering situations simply because of the difficulty of moving them, unless somebody can come up with DURABLE form of modular dis-assembly and re-assembly to make the task easier and quicker.
There ARE road-registerable floats currently available that WILL carry up to 250-300 tons but even they would be expensive to use in moving a dozer of say 150-170 tons. What's more, most road authorities, at least DownUnder, tend to frown on using these rigs to transport loads in one piece which could have been broken down into lighter loads. Party poopers. I KNOW the 'gear-jammers' would love to be able to brag that they had shifted a 170-ton dozer somewhere.
Just my 0.02.