What are the chances that these new Roamio's will be easily upgradable to support 4K HD? I have read several articles recently, stating that 4K content is not that far down the road in 2014. With the cost of getting to 4K viewing, I would hate to buy 2 Roamio's now, only to need to buy more in 18-24months. That is assuming Tivo can have product out that quickly. Thoughts?