I feel tad disappointed in the reface lineup of Yamaha's new synths, but, even still, I want them all except for the organ. I have a DX200, and I'm sure they are both FM synths, but function on different levels. Either one or the other has less operators or waveforms. Yet, I heard some patches that my DX200 can't do, and I imagine some sounds the new DX reface can't either. But both together should be a wicked combo!
The digital piano one sounds nice enough. It would come in handy for any track that needs that old Supertramp electric piano sound. Or some funk.
And I rather liked the CS synth as well, but I'm disappointed they didn't give it any CV functionality, and it would not likely be the first choice of the three. (2nd or 3rd, depending on what other gear I might choose from down the road)
If this gets Yamaha back in the hardware market, then it would only be if these sell well. If nobody cares, and they have a tough time with competing with all the other synths out there, then Yamaha maybe rushed these out too soon, and may or may not stay in the game if they just become the laughing stock compared to Roland Aira gear.