One significance of that is that it was the first sign that T234 (Orin) and T239 (Drake) have different CPUs. The T239 SoC seems to have been designed to fit in as small a physical space as possible (implying that this new device from Nintendo will have a very similar form factor to the original Switch).
The above picture is just a preliminary version of T234 (
from the Nvidia leaker kopite7kimi), but it serves to show how much space the GPU takes up in this design. For the T234, this is a large 2048 CUDA core GPU with 4MB of L2 Cache (the L2 Cache takes up a fairly large and separate space in the die). Since Nintendo probably had some involvement in the design of T239, which was likely always going to be derived from T234, they might have decided that two good ways to save space would be to cut the CUDA cores from 2048 to 1536 and the L2 cache from 4MB to 1MB.
Physical space is far from the only consideration when making decisions like this, but it most likely was a big factor here. In regards to the GPU's L2 cache, Nintendo probably thought that it would be fine to instead rely on the CPU cache wherever possible, which is what implied Drake has a CPU that has better cache than Orin's Arm Cortex A78AE's 4MB or 6MB of L3 cache (
see page 6 of this technical brief). The 8-core Arm Cortex A78C can have up to 8MB of L3 cache, and an 8-core CPU is mentioned in
the T239 Linux commit from last year.
This is all nothing new for people who have been following this thread for a long time, but it's always a good reminder of just how unique and tailor made for Nintendo the T239 SoC is, at least based on what we know so far.