For me, 5GHz barrier is just a "sensation" number, meant to impress. Because, no matter what, 4800MHz vs 5000Mhz is "only" 4% better performance (at similar IPC). Difference is barely noticeable in real usage, if at all.
Of course, AMD shows new 5xxx series CPU in best light. But truth to be told, AMD was never accused for "false advertising". And so, if AMD managed to increase IPC performance by almost 20%(!), then 4% less clock speed is practically irrelevant. Especially if that also means much better power efficiency -and it does in AMD case.
Are new 5xxx CPU's worth the money AMD ask for? Of course not. Prices are now just being adjusted to Intel's already overpriced products. In sense: we (AMD) have better product (than Intel has) and so, similar prices are justified. Or should I say... expected by buyers?
Yes, we need to wait for actual reviews, to get better comparison. And at the end, my wallet will decide