In essence you get a CPU that is 4 (!) architectures newer.

Here are the architectures of Intel (according to Wikipedia):

1. i686 (Pentium Pro, Pentium II, Pentium III)

2. Core (Core 2)

3. Nehalem (Core i7-920, Core i5-750)

4. Sandy Bridge (Core i 2000 series)

5. Haswell (Core i 4000 series)

6. Skylake (Core i 6000 series)

7. canceled due to low yield

8. Sunny Cove (Ice Lake mobile 10xx and desktop 11xxx)

9. Willow Cove (Tiger Lake mobile 11xx)

10. Golden Cove (12xxx and 12xx)