Best place to stay in Vegas is the Aria Sky Suites. The Aria itself is probably my favorite, but if you can get a room in the sky suites you'll be loving it.
https://www.aria.com/en/hotel/aria-sky-suites.html
Vegas is worth the trip. Do it one day if you get the chance. Oh, and it seems that Sony in going to wait till MWC in March to release the new XZ1 Premium. Supposedly they are releasing the middle to low end new phones at CES. Bummer!
Does it have the 4k screen? I have a Galaxy s8+ and the screen is unbeatable. Returned an iPhone X cause the screen was subpar, even though it did take better pictures.
How are those 20+ mp Sony cameras on their phones?