Nextdc (ASX: NXT) has seen a 4% surge in its share price, following the announcement of additional customer contract wins. This data center business, positioning itself as Asia's most innovative data center-as-a-service provider, is building the infrastructure platform for the digital economy. The company's pro forma contracted utilization has increased by 73MW (11%) to 740MW since the last update, which is a remarkable growth considering the previous announcement of a 60% increase (250MW) since December 2025. This growth is primarily driven by the demand from big US tech and AI businesses. However, the market's perception of Nextdc's valuation is a bit more complex. Despite the impressive growth, the share price is now 25% lower than its mid-June 2024 peak. This could be an indication of undervaluation, but the uncertainty surrounding the actual economic life of these assets and the potential impact of new technology makes it hard to determine a fair value. Personally, I think the market's skepticism is understandable, given the scrutiny on data centers globally based on their energy, water, and land usage, as well as noise pollution. This could potentially hamper Nextdc's growth in the future. However, the company's strong growth trajectory and its ability to tap into the demand from big tech and AI businesses make it an interesting investment. What makes this particularly fascinating is the potential for Nextdc to become a key player in the digital economy, despite the challenges it faces. In my opinion, the company's growth and its innovative approach to data center services make it a compelling investment opportunity. However, investors should be cautious and consider the potential risks, such as the impact of new technology and global scrutiny on data centers. From my perspective, Nextdc's share price may be undervalued, but it's essential to conduct a thorough analysis before making any investment decisions.