Well, no point testing the HTPC if it's going away.
You planning on doing mostly 4K HDR once you get your 4K HDR PJ?
I think 4K HDR is cool. But for most things, 2K already looks great. So I'll probably just do mostly 2K and do a few 4K 10bit HDR if the contents is awesome enough.
I have a friend who just got the JVC NX7 (along with RBH SVT/R Tower HT system, Yamaha CX-A5200, ATI AT527NC). When I told him I was still doing 2K for most things, he looked at me funny and said he expects to watch EVERYTHING 4K HDR.