Hours is a fairly ridiculous estimation metric for a large project being planned for several months hence and requires a lot of cognition to reason about. Yes, we can do math and convert, but the UI shows hours in many places and when it shows days, it still shows a false level of precision. Such views should round to weeks or months and use decimals sparingly. (I.e. 3.5 months would be ok, but 3.423 or even 3.4 would not be.)
Would be great if the capacity would also consider points rather than hours for those using more Agile portfolio management approaches with product line funding models.