Let $H$ be a regular hexagon of side length $x$. Call a hexagon in the same plane a "distortion" of $H$ if
and only if it can be obtained from $H$ by translating each vertex of $H$ by a distance strictly less than $1$. Determine the smallest value of $x$ for which every distortion of $H$ is necessarily convex.
1. **Understanding the Problem:**
   We need to determine the smallest side length \( x \) of a regular hexagon \( H \) such that any distortion of \( H \) remains convex. A distortion is defined as translating each vertex of \( H \) by a distance strictly less than 1.

2. **Visualizing the Distortion:**
   Consider a regular hexagon with side length \( x \). Each vertex can be moved by a distance less than 1. The worst-case scenario for losing convexity is when three consecutive vertices are moved in such a way that they become collinear.

3. **Analyzing the Worst-Case Scenario:**
   Let's focus on three consecutive vertices of the hexagon. If the middle vertex is moved inward towards the center of the hexagon and the two adjacent vertices are moved outward, the side length \( x \) must be large enough to prevent these three points from becoming collinear.

4. **Geometric Considerations:**
   In a regular hexagon, the internal angle between any two adjacent sides is \( 120^\circ \). For the three points to become collinear, the distance between the two outer vertices must be at least \( 2 \) (since each vertex can move by a distance less than 1).

5. **Using Trigonometry:**
   Consider the triangle formed by the two outer vertices and the center of the hexagon. The distance between the two outer vertices is given by:
   \[
   2x \cos(30^\circ) = x \sqrt{3}
   \]
   For the hexagon to remain convex, this distance must be greater than or equal to 2:
   \[
   x \sqrt{3} \geq 2
   \]
   Solving for \( x \):
   \[
   x \geq \frac{2}{\sqrt{3}} = \frac{2\sqrt{3}}{3}
   \]

6. **Ensuring Convexity:**
   To ensure that the hexagon remains convex under any distortion, we need to consider the maximum possible distortion. If each vertex can move by a distance less than 1, the side length \( x \) must be sufficiently large to accommodate this movement without causing collinearity.

7. **Conclusion:**
   The smallest value of \( x \) that ensures every distortion of the hexagon remains convex is:
   \[
   x = \boxed{2}
   \]