Wait For More Power, Performance & Storage
Google makes improvements year over year to just about every aspect of their phones, as does the component makers like Qualcomm. We know this phone will be good.
The Pixel 4 finally has 6GB of RAM, but unfortunately still only 64GB of storage and a tiny 2,800 mAh battery. It's almost insulting. When other brands are offering 128 or even 256GB as the standard, 4,000 mAh battery packs and faster UFS 3.0 storage, we expect the same from Google. That might finally happen in 2020.
With the Pixel 5 next year we're expecting an even better, faster, yet more efficient Snapdragon 865 processor with 8GB of RAM and at least 128GB of storage. Qualcomm is even working to make new phones slimmer. That references the Galaxy S11, but the same Snapdragon 865 platform will be in the Pixel 5.
Not to mention Android 11. Yes, the next Pixel will likely be the first phone to ship with Android "R" 11.
If you haven't seen enough from current devices in terms of hardware AND software to warrant busting out your wallet, wait for what's coming in the new year.