I don't think the existing Celeron supports the Intel HD graphics. If I'm going to upgrade tho I may as well get something that supports 4K. I'm bound to have it at some point.
I don't care about having the Latest And Greatest as long as what I get will work, especially when I can save a couple hundred bucks on the difference (Apollo Lake vs Coffee Lake).
I do miss the Good Old Days tho when one could just pick out the fastest processor and know you had the best one. Sigh.