No. The Play Store is a user-level app. Sideloading it does not root your device or void any warranty.

After extensive testing, the for KitKat is:

After extensive testing on Android 4.4.4 devices (ARM and x86 emulators), the consensus among developers and advanced users is clear:

The "best high-quality" APK for Android 4.4.4 is not the newest version number. It is the last stable, legacy version that Google officially signed for KitKat.

To find the , you should look for the latest versions that still support API 19 . Best Google Play Store Versions for Android 4.4.4