My prediction is "pretty broad / general" and applies for today as well:
1. One-word .and good two-word .com names and acronyms.
2. Short and good .org words or acronyms.
3. Great keyword + extension new gTLDs (with reasonable renewal fees).
4. Some numerals. Mostly .com, but maybe also .cc and .net.
5. Great one-word ccTLDs with extensions such as .in, .io, .de etc.
More specifically, I think that tech, media and finance domains will continue to sell.