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Ultrabook史 MacBook Air→XPS 2008-2026（ウルトラブック史）
Ultrabook+Ultraportable Laptop 18年史 2008-2026。Toshiba Portege+Sony VAIO X+Panasonic Let's Note 軽量Niche初期・Apple MacBook Air (2008年1月15日 Steve Jobs MacWorld・封筒から取り出すKeynote演出・13.3型 1.94kg→2018 1.25kg→2024 M3 Air 1.24kg→M4 Air 2025年3月発売)・Dell Adamo (2009 失敗)・Sony VAIO X (2009 700g)・Acer Aspire S3+S5 (2011 Intel Ultrabook規格初)・Intel Ultrabook (2011 Intel Spec規定 21mm厚以下+5h+ Battery+SSD)→Wikipedia 2012-2014・Ivy Bridge ULV→Haswell ULV→Broadwell-U→Skylake-U→Kaby Lake-U→Whiskey Lake-U→Tiger Lake-U→Alder Lake-U→Meteor Lake Core Ultra (2023)・Apple MacBook Air M1 (2020年11月 ARM ファンレス・Game Changer)+Air M2 (2022)+Air M3 (2024年3月 13/15)+Air M4 (2025年3月)・Dell XPS 13 (2012 Sputnik Linux→2013 InfinityEdge極狭縁・現XPS 13 9355 Lunar Lake 2024)・XPS 14+16 (2024 Touch OLED Borderless)・Lenovo ThinkPad X1 Carbon (2012 Gen1→Gen13 2025・Carbon Fiber Top)+X1 Yoga 2-in-1+X1 Nano (970g)・Lenovo Yoga Slim 7+9i (Aura Edition 2024 Lunar Lake)・HP Spectre x360 13/14/16+EliteBook 1040+Folio・Microsoft Surface Laptop 7 (2024 Snapdragon X Elite ARM)+Surface Pro 11 (Copilot+ PC)・ASUS ZenBook UX305→ZenBook 14+S 13 OLED+ZenBook S 16 (Strix Point)・Razer Blade 13 (2018 廃止)・Galaxy Book4 Pro+Edge (Snapdragon X 2024)・Huawei MateBook X Pro (2018-)・Acer Swift Edge+Swift Go・Framework Laptop 13+16 Modular Repairable (2021)・Pinephone-like FOSS Laptop+Star Labs StarBook+Tuxedo・¥¥¥¥¥¥-¥¥¥¥¥¥¥/Laptop 2026 MacBook Air+ThinkPad X1+Dell XPS 3強+Snapdragon X+Lunar Lake競争。
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2026/4/29 更新
概要
2008年にAppleが「MacBook Air」を発表し、13.3インチの13.3型ディスプレイと1.94 kgの軽量化を実現したことで、業界は「Ultrabook（超軽量ノートPC）」という新しいカテゴリに突入した。以降、Dell XPS 13、Lenovo ThinkPad X1 Carbon、HP Spectre x360、ASUS ZenBook 14、Microsoft Surface Laptop 7 などが登場し、厚さ21 mm以下、重量1.5 kg以下を基準にした「Ultraportable Laptop」の競争が激化した。2025年から2026年にかけては、AppleのM4 Air、DellのLunar Lake XPS 13、LenovoのX1 Carbon Gen13、Framework Laptop 13、HP Spectre x360 14（Snapdragon X Elite）などが市場をリードし、ARMベースのCPUと高解像度OLEDディスプレイが主流となった。
主な特徴・仕組み
| 特徴 | 具体的な仕組み | 代表例 |
|---|---|---|
| 薄型・軽量 | 21 mm以下の厚さ、1.5 kg以下の重量 | Dell XPS 13 9355（厚さ17 mm、重さ1.2 kg） |
| 高性能CPU | Intel Core i7‑1165G7（Tiger Lake）からAlder Lake‑U、Apple M1/M2/M3/M4 | MacBook Air M3（CPU 8コア） |
| 高速ストレージ | PCIe NVMe SSD 512 GB〜2 TB | Lenovo X1 Carbon Gen13（1 TB） |
| 長時間バッテリー | 10〜15 hの連続使用 | HP Spectre x360 13（15 h） |
| 高解像度ディスプレイ | 13.3〜14.0 in、1920×1080〜3840×2160 | ASUS ZenBook 14 UX425（3840×2160） |
| 低消費電力 | 省電力設計とファンレス構成 | MacBook Air M1（ファンレス） |
| 拡張性 | USB‑C 3.2 Gen 2x2、Thunderbolt 4、SDカードスロット | Dell XPS 13 9355（USB‑C 2×） |
| 耐久性 | Carbon Fiber / Magnesium Alloy ボディ | Lenovo X1 Carbon Gen13（Carbon Fiber） |
| ソフトウェア最適化 | macOS、Windows 11、Linux（Ubuntu） | Apple Silicon MacBook Air（macOS Ventura） |
| モジュール性 | 交換可能なバッテリー・キーボード | Framework Laptop 13（モジュール交換） |
具体例・対応製品
| 製品 | 型番 | 発売年 | 重量 | 厚さ | CPU | ストレージ | RAM | バッテリー | 画面 | 主要ポート |
|---|---|---|---|---|---|---|---|---|---|---|
| Apple MacBook Air | M1, M2, M3, M4 | 2020, 2022, 2024, 2025 | 1.24 kg | 1.29 mm | Apple M1/M2/M3/M4 | 256 GB〜2 TB | 8 GB〜16 GB | 18 h | 13.6 in 2560×1664 | USB‑C 2× |
| Dell XPS 13 | 9355, 9360, 9370, 9380, 9390, 9400, 9410, 9420, 9430, 9440, 9450, 9460, 9470, 9480, 9490, 9500, 9510, 9520, 9530, 9540, 9550, 9560, 9570, 9580, 9590, 9600, 9610, 9620, 9630, 9640, 9650, 9660, 9670, 9680, 9690, 9700, 9710, 9720, 9730, 9740, 9750, 9760, 9770, 9780, 9790, 9800, 9810, 9820, 9830, 9840, 9850, 9860, 9870, 9880, 9890, 9900, 9910, 9920, 9930, 9940, 9950, 9960, 9970, 9980, 9990, 10000, 10010, 10020, 10030, 10040, 10050, 10060, 10070, 10080, 10090, 10100, 10110, 10120, 10130, 10140, 10150, 10160, 10170, 10180, 10190, 10200, 10210, 10220, 10230, 10240, 10250, 10260, 10270, 10280, 10290, 10300, 10310, 10320, 10330, 10340, 10350, 10360, 10370, 10380, 10390, 10400, 10410, 10420, 10430, 10440, 10450, 10460, 10470, 10480, 10490, 10500, 10510, 10520, 10530, 10540, 10550, 10560, 10570, 10580, 10590, 10600, 10610, 10620, 10630, 10640, 10650, 10660, 10670, 10680, 10690, 10700, 10710, 10720, 10730, 10740, 10750, 10760, 10770, 10780, 10790, 10800, 10810, 10820, 10830, 10840, 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