kiwijunglist: NO - because an htpc is better than any other device.
Most likely yes.
Personally I prefer using our current ATV compared to our HTPC (a Mac Mini) as it is less complex and more easy to control via a simple remote, and therefore has considerably higher WAF. The more complex a device and the more it can do, the more likely there'll be problems and the more difficult they'll be to fix; the ATV just works.
While it would be great if the new ATV can support Kodi (wishful thinking, but this nearly all the HTPC is used for now days), even just allowing the development of apps so all SVOD services we must currently either airplay or watch on a different device (BBC iPlayer, Channel 4, ITV, TVNZ, TV3) would make it worth it (as long as the price doesn't go too much further north of it its initial RRP).
Speaking of SVOD services - I doubt we'll watch Channel 4 content again on the ATV (via Airplay) as I just can't cope with the compulsory 4-minute ad break (including before the programme even starts) - is there really no way to be able to skip them?!