> For example, they updated the Celeron/Pentium/i3 line to Kaby Lake even though customers probably won't even notice.
The difference between Sky Lake Celeron and Kaby Lake Celeron is small, but it's not like it's a big difference for i7 either. I don't think a lot of people are tossing out their Sky Lake CPUs and putting in Kaby Lake at any part of the performance curve; it's just if you're upgrading from something older (maybe Sandy or Ivy Bridge) or buying something new that you may want to go with the newer core design. Eg: Celeron G3920 (Skylake) vs G3930 (Kaby Lake) are both 2.9Ghz but G3930 is about $10 cheaper and may have a slightly nicer GPU.
The difference between Sky Lake Celeron and Kaby Lake Celeron is small, but it's not like it's a big difference for i7 either. I don't think a lot of people are tossing out their Sky Lake CPUs and putting in Kaby Lake at any part of the performance curve; it's just if you're upgrading from something older (maybe Sandy or Ivy Bridge) or buying something new that you may want to go with the newer core design. Eg: Celeron G3920 (Skylake) vs G3930 (Kaby Lake) are both 2.9Ghz but G3930 is about $10 cheaper and may have a slightly nicer GPU.